I've used and enjoyed Yuki-tastic for years, but it's a little bit limited.
I really do not like Trueno's.
I'm getting used to Jirue's Awesome Colorset - Faded.
I know it's been discussed before and can't be done, but I would love it if this game had no colorsets, but rather a colour picker, so you can have any colour from a colour palette, and save particular ones.