Nintendo.. I hate them. I bought a Wii, hoping for lots of those action adventure games, but they just don't continue to deliver. With exception of Brawl, Nintendo didn't have any good game for 2008. They better have a good 2009 line-up or I'll be selling of my Wii.
Boy am I happy that I've switched to PC gaming.
Go for PS3 if you want to save money and have a blu-ray player.
360 if you want to save even more money and don't need a blu-ray player.
Go PC if you don't mind having to wait for a few games a bit longer, don't mind spending a bit more cash and want the best graphics one can get.
If you love games like Fifa, you shouldn't go PC though.