What are your main collection(s)?

[PapaStu]

Actively collecting:

PlayStation (about 500 from a set, before variants/demos and the like)
Nintendo DS (cause i'm a crazy fool)
X360 (main system I play, plus I'm a LE fool)
PS3 (system exclusives)
3DS (it'll be my next DS, mark my words)

Kinda sorta collecting
Dreamcast (I've got a 'variant' complete collection, save a Speed Devils variant, I could use the few DC demos, otherwise it's done)
NGPC (Complete US collection, could use to get the NPG 'English' games, and I need 3 US system box variants, if more US clamshells show, then i'll get em, otherwise its a complete set)

Anything else is a grab cause it's 'special' to me kind of thing.

- DS games (MOAR DS PLOX)

MOAR DS!