Hmmm, that's hard. It would be a tie between my Amazons and my Spotted. I love them both equally for different reasons. The Amazons give me a challenge, they don't hesitate to bite at me when I'm annoying them (like helping them remove bad shed), they really know how to put me in my place!
My Spotted is so docile and gorgeous, and her enthusiasm with food items is amazing. She was my first snake and I don't regret the choice one bit. She's never given me any problems and she puts up with my cat staring at her enclosure.
"A rattlesnake that doesn't bite teaches you nothing."