I go back and forth between the platforms.
The NES, SNES, Playstation, PS2, Xbox, GBA, and DS lite are all great systems. I have games that I still play on each of them.
I mainly got an Xbox because my computer back then couldn't handle Doom 3 or Halo 2.
After upgrading my computer, I've been focusing on PC games. If I can afford a 360 or PS3 any times soon, my Xbox and Playstation will be retired and passed on to someone else. I'll probably focus on console games for a while if I get to the point where I can budget either of them.