Your ships are kinda dinky. Sure, if you say so. I guess you're trying to point out that a lot of my original ship designs are frigates, light cruisers, and destroyers, rather than heavy cruisers and dreadnaughts. The way I see it, most of Starfleet is composed of these smaller ships. The Galaxy and Ambassador class ships should be the exception, not the norm, so there shouldn't be too many ship classes of that size.
Smaller ships are also easier to park.
I'm not a real stickler for accurate colors, or at least, not anymore. Now I just use a two tone haze grey scheme, FS36375 and FS36320 for Federation ships. My more recent models all look pretty consistent, and I don't have to spend time mixing colors. I also just letter my ships as ones never seen on screen to keep the hard core nit-pickers off my back. When I built my Enterprise-D model, I used Testor's Model Master paints, so I started off with pretty much the right color.