[Nexus 4 General] nawoa:
Fully stock 4.2.1, not rooted or modified in any way, 79 apps installed. I don't have Location History or Latitude enabled. I have the "Email" app disabled since it just clogs up my app list, I doubt that's relevant. I also have "Currents" disabled since I prefer Reader.

I just rebooted my phone, here's what's automatically running:

SoundHound (1 process, 1 service)

Google Services (2 processes, 1 service)

Maps (1 process, 1 service)

Google Play Store (1 process, 1 service)

Android keyboard (1 process, 1 service)

Here's what's cached:

Nova Launcher

Clock

Beautiful Widgets

YouTube

Google Account Manager

Gmail

Calendar Storage

Calendar

Media

Goggles

Google Play Music

Gallery

Picasa Uploader

Google+

Solid Explorer

Talk (I'm signed in)

Android Core Apps

Here's what I have set to sync in my Google account:

Calendar

Chrome

Contacts

Drive

Gmail (with two accounts)

Play Music

Reader

Connectivity features:

WiFi - Only 2.4 GHz, Always On, connected to my home WiFi which is a 300 mbps N-type router, WPA2 PSK, AES-only

Bluetooth off

Tethering off

NFC off

HSPA which varies between "-105 dBm, 4 asu" at worst and -95 dBm, 9 asu" at best (pretty bad either way)

LTE off

Misc:

Screen brightness: Auto

Screen sleep after: 2 minutes

Static wallpaper

Haptic feedback is on and I often type a lot when I'm using the phone, including in the 5h 44m screenshot I posted

Location access: On, GPS on, WiFi & mobile network location on

Phone's not encrypted

Google Now was on during both of the screenshots I posted, but I've turned it off since then because I prefer having Search start faster

Only "Android keyboard" and "Google voice typing" are enabled as input methods

"Back up my data" and "Automatic restore" are both enabled

No accessibility features are enabled except "Auto-rotate screen"

Developer options: off

LTE not enabled

Beautiful widgets set to sync every hour but not on wake

I don't have Facebook installed, if that's unusual

Dropbox isn't set to sync

Here's my entire app list, minus a few I've just disabled in the last couple minutes like Pinyin IME, and a couple redacted bank/store apps that would compromise my privacy:

Adobe Air

Aldiko Book Reader Premium

Amazing Alex

AndChat (Donate)

Andoku Sudoku 2

Beautiful Widgets

Catch Notes

Chrome

ConvertPad Plus

Cool Tool - system stats (this is a really great app, by the way. It shows customizable live system stats in an onscreen window)

Dropbox

Dungeon Village

Freecell+

GBA.emu

Gin Rummy

Gmail

Google Calendar

Google Drive

Google Goggles

Google Play Books

Google Play Magazines

Google Play Movies & TV

Google Play Music

Google Reader

Google Search

Google+

Great Little War Game

Hearts

IMDb Movies & TV

IP Webcam

Jet Set Radio

Kairobotica

Maps

Minus

MX Player Pro

Nova Launcher

Nova Launcher Prime

Oh!Edo Towns

Osmos HD

PocketCloud Remote Desktop Pro

Pool Break Pro

RealCalc Plus

Rebuild

Reddit News

Shredder Chess

Solid Explorer Beta2

Solitaire+

Soundhound [infinity symbol here]

Spades

Speedtest.net

Spider Solitaire+

Star Chart

Steam

Street View on Google Maps

TalkBack

TapeMachine Recorder

TeslaLED Flashlight

TETRIS [registered trademark symbol here]

tTorrent Pro

Twitter

Unified Remote Full

Venture Towns

Voice Search

White Noise

Wifi Analyzer

YouTube

Zaxxon Escape

uTorrent Remote

...Nothing really unusual. I've got many more apps similar to the ones above (purchased but not currently installed), and I've never had unusually bad battery life on any device I've owned So, I don't know, maybe I'm just a very boring person? I don't get a lot of email and I'm not on Facebook. I have Twitter installed but I haven't set it up yet. G+ is set to sync but I'm only following like a dozen people.

Looking over my list, I noticed something that might be noteworthy: I always buy the premium/donate/ad-free version of apps whenever they're available, so maybe the lesser amount of ads, tracking code, and other similar crap like that has an impact? I also never install warez or dodgy apps of any kind, which might for some other people result in lots of added botnet traffic, or traffic from all their personal data being stolen... not accusing you or anyone here of that, but it assuredly affects many people - especially those people on devices that aren't updated.

You might try running your device in Safe Mode and seeing if your battery life is any better. If it is, then ****ty apps are to blame, not any defect in your phone. Keep in mind that many apps use built-in Android services, causing those services to appear to be the cause of battery drain rather than the apps themselves. This is fundamental to Android's design and can't be "fixed" in any way. Lots of people say that "Android System" and "Android OS" and "Mediaserver" show up as major sources of battery drain, but these are all made up of various services that apps call upon in order to perform their functions. For example, the app I have installed called "White Noise" plays various audio to help me sleep, and it plays this audio via "Mediaserver". In the morning, "Mediaserver" appears to have eaten up a chunk of my battery because it's kept the phone from fully sleeping, while "White Noise" only has a few minutes of CPU usage.. but lots of ignorant people assume that there's a bug in Android causing that dreaded "BATTERY DRAIN DERP DERP DERP" issue. Another example is an app that downloads a lot of data - you'll notice that your battery stats say that wifi is draining the battery, when you can probably figure out yourself logically that it's the app downloading the data via wifi that's actually to blame for that battery usage. I haven't tested it, but I can say with some certainty that apps which use mobile data will appear the same way, with the app seeming to use almost no power while your mobile network connection will get all the blame.

Honestly, I really wonder if all these "optimizations" people do on their phones are what's at fault for people having terrible battery life. Custom kernels made by people who perhaps don't fully understand what they're doing, custom ROMs built by people who value benchmark scores over real-world usability, people who disable apps and services that are interdependent with core Android functions and 3rd-party apps and then wonder why **** breaks, people who overclock devices that are still brand-new, people who think that as long as the voltage is the same or lower then power usage will be the same or lower even if they overclock, etc.

That last one is full retard by the way, as anyone who's overclocked a PC knows (or should know). Even if voltage stays the same, current doesn't necessarily stay the same, and neither voltage nor current are necessarily reported with 100% accuracy. Basically, electricity can be used in one of two ways: "work" (doing something productive) and waste (in the form of light and/or heat - which is sometimes the intention, like in lightbulbs and ovens). Chips are binned, not according to what frequency they're capable of, but what frequency they're efficient at. Heat takes a lot of power to generate. In other words, if your device gets hotter after you overclock it, then it's using more power, probably a lot more... and apparently kernel developers don't even know this, which I find frightening to say the least. Or, perhaps more likely, kernel developers do know this but they don't care. Certain developers make a lot of money off updater/manager app purchases and donations, so marketing is what matters most to them. My i7-2600k can hit 4.4 GHz at its stock voltage, but I need to greatly increase the allowable current, and as a result I do get better performance, but my CPU also gets a lot hotter, even with the massive heat sink I have on it.

This carefully-edited massive post full of helpful original content in real English brought to you without page-long signature, begging for thanks, list of every device I've ever owned or touched, telling you what phone/app/rom/kernel I'm posting with, etc. It's called "not being an asshole".