A couple of random questions

Ok, so first question:

I just won Day Of Defeat from gameminer and I was wondering if it's something I might actually enjoy. Keep in mind, I'm not a real fan of FPS games unless there's something about them that makes them stand out from the crowd, like Bulletstorm with it's nut-shot rewards, F.E.A.R. with the whole thing of being able to get me REALLY feeling the creepy-tension, that sort of thing...that and the fact that I've never actually played an online-only/MP-only FPS before and I'm kinda nervous about being a total newbie to the scene...any advice? Should I just find someone to give it to?

Second question:

I found out about 15 minutes ago that I got booted from a Steam Group that seems to still be going strong, they don't have any membership requirements that they mentioned or anything so I have no idea what I did wrong, if anything, should I cry? Or just forget them and move on?

Last question:

I'm too bloody lazy to go hunting for the answer myself so I was wondering if anyone here knows if a "no thanks/not interested" vote on Greenlight is actually counted against a game? Should I start actually voting no on games that don't interest me or should I just keep leaving them alone?