What is a good pet snake?

i have 1 ball python, and 1 bearded dragon.(dont want to leave out bearded dragon...he he) and im going to be getting another snake soon because my ball python will be getting a bigger tank so i will have a empty one...ive already looked at blood pythons, Columbian boas, red tail boas, hog island boas, sand boas, jungle carpet pythons, and more. im not saying i dont want any of these im just not sure what i want for sure...i want one that i around maybe a little bigger than a ball python like 5-7 feet. i want one that is bulky though, unlike cornsnakes. like a hog island boas but i heard they can be mean... so i want to hear what you think. so please tell me your opinion and dont forget to tell me why. thank you