As for me it depends on which game i want to play or what to do:
Xbox 360: Dead Space, Gears of War and Halo on LAN-Parties
PS3: Blue Ray-Player - Movies and Killzone
PC: biggest time eater of all - VNs, watching anime, Games like DayZ, BF 2142, Stalker, Crysis
SNES: FOR TERRANIGMA (sorry - out of topic not really "modern" console)
guess i am an omnivore regarding the tech-matter, every company has its own strong points.
btw, my console downfall began with playing halo 1 on a good old black "invincible" xbox.