As with any animal you as an owner need to learn to respect and read them. I have owned a few ball pythons and some tolerate being handled more then others. Just like me and you, they too also have bad days and sometimes want to be left alone. It is up to you as the keeper to understand that and to give them the respect and space they need.
Overall to be a bit more specific to your question, I would say that ball pythons have a very docile disposition. They all, for the most part, seem to tolerate handling quite well. But compared to a corn snake the husbandry is a fair bit more complicated. As I tell every new reptile owner, is to just be patient. Don't let the acquisition fever take complete hold over you. If you decided to go forward with a ball python, ensure you get a proper cage, heating elements, humidity and all other essential items in place and set before you actually purchase one. Trial n error while they snake is in your care is not ideal.
Either way you go, both the corn or ball pythons are great choices. Feel free to ask questions and post your comments/questions/concerns. One thing I have learned about this community is that we all truly support each other, and non of us want to see someone else with a passion for these animals to fail.
Best of luck! You will do great.
Greg