PS3 drew me back into console gaming after a few years of PC-dom (inorite, the opposite of what everyone else is doing). It also reignited my interest in Sony after it had dwindled a little during the PS2 years. Which also seems to be the opposite of everyone else.
But yeah, PS3. Wii was a slight disappointment for me, I actually liked my Gamecube better. The games I do have for Wii are absolute masterpieces, but there weren't enough of them to sustain my interest. Haven't owned a 360 for a long enough period to judge on that, really. When I borrowed my friend's 360 for a few months, it seemed like a solid enough console with a good library, though.