For my part, I think the main reason is the collectability factor of FoP. They are relatively cheap, and it's fun to hunt for the ones you need. Furthermore, there is a little bit of mystery surrounding the line: are there variations, will there be a wave 2, how rare are the rares, etc.
Personally, there are only a few figures that I really think are neat. I generally don't collect human toy figures, but still, FoP is sucking me in!
