As a miniature battle gamer, I think I love converting models the most. I love making something unique, something that is entirely mine and original, and making miniatures that other people will 'wow' over.
Who knows if I am actually all that good at converting, but I like to think I am... at least enough so that I keep doing it. Here are some of my old favorites that I've made and still own (older models having been sold unfortunately).
My old Inquisitor model for my Deamon Hunter / Witch Hunter Army for Warhammer 40k.
My Eldar Ranger conversion for 'Inquisitor'.
Several of my models for the 'Path of Glory' style Warhammer Skirmish game that we were going to play, but never did. =(