I see a few comments about getting a super dwarf retic, I just picked one up and I'm not sure I'd recommend it unless you are an advanced keeper. I told myself I'd never get a rat snake because of how aggressive they are, and my SD is every bit as aggressive as a King rat or Texas rat snake, fast, and totally unpredictable. And if you ask around that's the general attitude of most super dwarfs, especially when young. With a lot of handling you can tame just about any snake but snakes have a certain behavior pattern to the certain type of snake in general and I believe super dwarfs can just be plain difficult.
It also depends on how much super dwarf blood they have in them, the one I have is super dwarf + Jampea dwarf + mainland all mixed in one snake. They say the more mainland blood the bigger they get but also the more chilled out they are. I plan on breeding my super dwarf to my dwarf 50% mainland, so the babies should get bigger having more mainland blood but should be easier to tame down. That SD wouldn't be so bad if he wasn't so dang fast! I swear, it's like catching a wild snake in the tall grass, that thing is just wild. Only rat snakes come close to an SD as far as behavior. Check out this video and see what Brian says about the King rat or Texas rat snakes, I think it's similar to an SD retic. There are exceptions and some can become really tame.
https://www.youtube.com/watch?v=7C3CGuRpF8I