I totally agree with fragswill. Sure ppl online are morons for looks, but they do make up the majority of frequent players, I'd bet. To make me sound young, my father plays UT and has for a full year now, any type of gameplay, and some TacOps because the guns are cool. He played Brunel and thought it was incredible. I pointed out all the details and how you did them, and he was quite impressed. He's played online all of a few times, and heck he's 47 so who'd expect him to? I on the other hand played the map a few times and those few times were with less than 2 bots so that I could look at it. Making something phenomenal is great, but I also like to play, so make something in between and I'm happy. Sure 150 polys doesn't look so hot anymore, but the engine was made for it, and that hasn't changed.
You can map for CliffyB, but no one plays anything that 0wns his white ass.