I haven't read the other answers here, and I'm sure you're getting many of the same responses, but the more the merrier, right?

1) No. When women ask me what I do for work, I get just as many awed looks and statements like "Wow! That's really impressive!" from them as I do from men. I've been to career fairs recruiting college students for entry level software engineering jobs. When I ask men if they're interested they often say like "No, sorry, not a CS major" or something, and women often laugh, or act like I'm crazy/making some sort of joke for asking them. Both genders need to get their shit together and realize that there's really no reason for this to be a male-dominated field.

2) Not at all. I don't think that engineers are "hired for their gender" as much as some, from time to time, may be "overlooked for their gender." I think this effect is much stronger as women age (everyone wants more girls in tech, but no one wants 40 year old mothers in tech. Although ageism is, granted, a factor for both genders), and for higher-level positions (women may be recruited for entry-level jobs, front end development, or UX design, but not, say, as IT managers, or lead security officers).

3) This is a genuinely interesting question. When I first started working, it didn't bother me at all that I was the only female. I mean, I hung out with guys a lot in high school, I have a master's in software engineering, I'm straight -- obviously, totally fine talking with men! It never bothered me at all.

But, as the months and years wore on, and I kept working at startups/small companies where there weren't any women besides me, or there was just a female office manager or something, I started to get a little "stir crazy." Can you imagine going months without having a single conversation with someone of your own gender? I lived with my boyfriend (now husband), and, while I was especially busy (wrote a book, did some freelance work, got a half-time master's over four years -- very few women involved with any of those), sometimes I didn't get out much on the weekends. There were literally no women that I could talk to, during day to day life.

I've tried to make more of an effort in recent years to talk to women and make friends with them, but it's a lot more difficult than it used to be, and I've been told that they feel like they're "talking to a guy." When I got married, there was a bit of a crisis when it seemed like one of my sisters wasn't going to make it to the wedding -- I didn't have any bridesmaids to replace her. I mean, scrolling through my list of Facebook friends, literally couldn't find any female friends much stronger than "casual acquaintance"

Anyway, the discomfort, for me, wasn't just "Oh no, all these guys around, this is super uncomfortable" but feeling really unsettled and unbalanced in a way that you can't quite put your finger on, and that feeling builds up over many years. For me, the problem isn't necessarily "too many men" (although there have been a few extreme instances where I really disliked being surrounded by all the dudes -- DEF CON, and "Friday beer o' clock and Call of Duty in the office," and that time one of my co-workers was confused about how vaginas work, spring to mind), as much as it is "too few women" and I feel like I'm missing out on a significant part of... womanhood? That sounds cheesy and lame, but, that's really the best way I can think to describe it. It would just be really really nice to have another lady around sometimes.