Hey, I know this is a strange question, but what miniatures did you learn painting skills on? Are there any models you have found useful for learning particular techniques and skills? I know you can practice on any model, but do any of you look at a model and think "that model would be awesome for practicing x skill"?
I found the Corpuscarii Electro Priests were really handy for attempting different skin tones, so my squad is probably what you'd call racially diverse since I wanted to have a go at pale skin, dark skin and as many as I could in between.
I also picked up an old metal Grey Knight Terminator a long time ago to paint up and I eventually used him to experiment with metallic effects and some tentative steps in Object Sourced Lighting.
Right, I've chucked a few of my pics in as examples, but which models have you learned the most from painting? Pictures are welcome, and success or failure doesn't matter here, only that you learned something from the experience.