*as of now*...
Butter Motley - Love the yellow, and the motley pattern makes it so intense.
Topaz - Again, love the yellow. Saw a picture a while back, and the smooth colors with the greenish eyes are amazing.
Bloodred - There's really no snakes more impressive, in my opinion, than a nice Bloodred.
These are just a few of the really captivating ones. I love them all, and maybe these are just the three that seem to stand out the most in any environment. I know that some of my snakes stand out more in different environments.