I’ve painted different figures from different periods just because I liked the minis at some point. As I lose interest, I sell them. I seldom sell figures from what I call "my own collection".
Even though I can lose interest in a period, I find out, with time, that I always come back at some point… when it happen, I’m always glad I didn’t sell them.
My collection is relatively small, or rather, I still have the place to store all those different minis so that’s not a problem… so far