Last Gen:
Xbox 360, Wii, PS3.
I use my 360 the most, but PS3 stilll used a nice bit. My wii is in hibernation.....
Current Gen:
Xbox One
Got it first because it has some cool looking exclusives like SO, QB, TF, but mainly because it has Halo (I love halo).
I'll get either a PS4, or Wii U this year, but not sure which one yet.