When I was younger, I actively collected model cars - which started taking up too much space. I am / was also an avid watch collector. I own about 90 watches or so, and I'm happy with what I have so I don't really buy often.
I also have about... twenty nice knives, a dozen flashlights, all in all some twenty computers... but I wouldn't consider it collecting per se. Usually I just buy something if I see something I like.
I'm just a person with a wide variety of interests I guess. Currently, I'm on a camera kick with about 35 cameras or so.