Normally I hate these kind of posts... But I'm feeling self-loathing today, anyway.
I already have a Wii, but would like to get one of the other consoles to facilitate a more explosions-oriented experience. As such, I cast myself upon MG.org's more experienced fingers. Guide me, great ones.
I used to be an avid gamer, but I really haven't kept up with modern technologies too much. I like the idea of getting a Blu-Ray player with a console (though I don't have a HDTV), so that's a point in the PS3s favour. Library wise, I'm not too versed with either, though I know the big titles of both - It used to be that the prospect of Final Fantasy 13 sealed the PS3 for me, but now that it's been announced for both systems, I'm not sure. PS3 has God of War 3, 360 has Gears of War... Both are good. I haven't really researched the online content of either all that much.
Really, I just have a Gamestop gift card I have to use, and could use some guidance.
Personally myself, I still find the 360 a better console. Games tend to be a bit more buggy and laggy on the ps3 I've found lately. The online catalogue of PS3 tickles my pickle more, all the old PS1 classics are steadily making there way onto there and all are compatible with PSP (which my missus just got for christmas). From a games point of view, and online play point of view, 360 is the winner. Media and nostalgia, PS3