I don't exactly collect lots of these things, but I've got a few over the years as gifts or things I just thought were cute. Basically any neat or cute figurines or representations.
It's a Ralsei plush! I got it a year or so ago I think, it's just been hanging out on my mantle ever since. Some argue whether or not black furred or white furred Ralsei's better, but I think both are fine personally.
A robot boy ball-joint doll I picked up on a lark a few years ago. I just wanted something to decorate my then bare mantle and it looked cute.
My mom made me a pair of bugs out of felt this Christmas. I love 'em!
Someone special to me gave me this cute duo of The Prince and a Katamari. I played those games a lot as a kid, so it's nice to have.