What i like about the last three taken outside is there's almost a glowing effect the snake has around him, from the sun - I think it looks really nice!
I've seen more focused pictures, but I have the same difficulty with my stupid camera - they are still more focused than the pics my camera will give me when I'm trying to photograph my snakes (if anybody can suggest a really good make/model, I would really appreciate it!).
All your pics though are still lovely, IMO - and you have some beautiful snakes, if I might add