Most snakes are shy! You'd be astonished at how terribly the media tends to portray them xD
Ball pythons in particular, however, are notoriously shy. They call them ball pythons because when threatened, they curl up in a ball with their head in the middle of their coils. It keeps a very vulnerable part of their body sage from attacks, see.
I can't tell you how many times I've accidentally bopped him right in the nose, and he just jerks away, rather than hiss or strike.
He hasn't chased me, but when handling him (or y'know, just sitting around browsing Tumblr while he's on my lap) he does tend to stick close. Likely for warmth reasons, but still
You should look into it! But please, please do lots of research first. Snakes makes fantastic, low-maintenance pets, but they do take some careful attention.
But if you are serious, I'd recommend looking up corn snakes and ball pythons.
I'd suggest looking into corn snakes more - ball pythons and corn snakes are at the SAME LEVEL, except for one little thing
Ball pythons teeend to be picky eaters, and fast whenever they please, for no discernible reason. It's nothing to worry about, but it can get stressful.
My little guy hasn't eaten in three weeks :/ Ball pythons can go for two months without eating before it gets to be anything to worry about, but y'know. Still. It chips away at your psyche. Eat, you little bastard! ;