I don't have a single playstation console. Probably the biggest reason is that I find the dual shock the most uncomfortable controller I've ever used. I also have 0 Sega consoles, manly because I never had one growing up and neither did any of my friends, so the desire to collect just isn't there.
I do have 2 PSPs (1 original, 1 GO), but those were free from dismantling my store's retail displays.
As for games, The Call of Duty games and simulation sports titles (Madden, Fifa, etc.). The only reason I have any in my collection is because I'm running out of other games to get and/or they've been dirt cheap. I even made it to 500 titles in my 360 retail library before getting more than 5 sports games for the system.