Blood pythons' temperaments can vary greatly depending on origin, lineage, and how much time/handling you're willing to put into them. Most good, CBB blood pythons are pretty easy to tame, and are no worse than say, young carpet pythons or Brazilian rainbow boas (both of which can also be nippy). If you're intimidated by bloods but like the body type, consider either of the short-tailed pythons (Borneo & Sumatran). Both tend to be relatively calm & easygoing right from the start (again, this can vary by lineage). If temperament is a big deal to you, then it would make sense to talk to breeders with long-term experience working with these snakes, and let them know about your experience level and expectations up front. The majority of blood & STP keepers who are serious about these animals also want to help others enjoy them, and usually can help match you up with just the right snake.
During the past 15 years I've kept every species discussed in this thread, as well as many others that haven't been mentioned...and bloods & STPs rank at the very top of my list for all-time favorites.If you can find a keeper local to you who's willing to mentor you or at least help you get some hands-on experience with them, that will give you a lot of perspective. They're wonderful snakes, especially when you understand what they're all about.
$.02...