For favorite snakes- I love my Mandarins! My Taiwan Beauty is a keeper though... He's so mellow- till the rats appear!
Favorite critters of the past, I still miss my Chinese Crocodile lizard (Shinisaurus Crocodilurus). Got him in 1989 when no one knew what he was ($35.00!) and raised him up to be a sassy guy. I gave him to a zoo to start a breeding project in '92 and still have regrets... One day I'll get a pair and add to the captive population.
I've mainly kept rat snakes and other colubrids (a few boids here and there) but the award for best tempered snake goes to the Central American Black Tail Cribo! He was just special. Maybe I'll try Indigo's one day- they're on the list!