PS3 has better graphics, can play Blu-ray movies, is more sleek (imo.) I think it looks better being black and like shiny-smooth, then the white(normal ones) kind of not-smooth plastic(or w/e they use on it lol) 360s. The 360 has The Halo series, which i loved, Fable series, which i love also. Both of those arent on the ps3 with = downside for me . AFAIK I heard alot of people get the red ring of death on the 360, but i havent gotten any errors on the ps3 yet. the ps3 online is FREE, which is even more amazingess to a ps3 . 360 has a really nice Dashboard. I prefer the ps3 tho as it seems more organized to me, and how selecting different accounts is kind of easier(IMO).
They offer totally different experiences, but personally the experience I want is given by the xbox 360, and really you guys aren't going to change anyone's opinion here