Here's my list of favorite changes:
1) Shapeshifter
This is the first color change that I learned, and my most used one. I like it because it is simple, instant, has good angles and fit nicely with my style. Also, it require a different "start condition" compared to many color change that I learned.
2) Jones change
If I hadn't seen it, this spot would be claimed by the Snap change. This move, in addition of twirling flourish, looks awesome! It rocks on stage performance, because is more angle sensitive. However, it can be used even in real people situation, if you execute the move for a few people at their eye-level. For cleaning up, just do the move at reverse.