I follow whatever system has fun games to play. Halo kicked ass. Never got into Halo 2 much. PS2 had tons of RPGs. I love my RPGs. The computer is perfect for online RTS and FPS competition. Nintendo throws out a few goodies once in awhile (i.e., Zelda, Melee, platformers). I think the idea of limiting yourself to a single system is moronic.
Although, as time goes on, and emulation spreads to the newer generations, CPUs will rule all, simply because they can do a little bit of everything.
Then again, jack of all trades, master of none.