First of all, right upfront I have to clarify whether or not you're one of those wiseguys who pithily refers to action figures as "dolls".
Because I have thousands of action figures but I will get incredibly annoyed when some putz refers to them as "dolls" so as to feel better about themselves.
Otherwise, I wouldn't say I "collect" but I do have some more traditional dolls as well as stuffed animals and such. I have one of the smaller vintage Rainbow Brite dolls from the early-'80s, a 12-inch Brandon Routh poseable Superman that came out back in 2005 or so, a 10- or 12-inch Henry Cavill BvS Superman from Mattel's Barbie line (I technically got it for my wife but we "share" it in a sense; it just sits on a shelf anyway), some MLP plush stuff, and a few non-poseable FUNKO MLP vinyls which I guess technically count as dolls.
But I wouldn't say I "collect" stuff like that, so much as I just buy stuff that catches my eye.