Possible mild autism or just a individual personality / normal toddler behaviour?

This sounds a lot like my son. I worried about the same things, but it is more than likely within the normal spectrum. When my son gets plenty of sleep (12-14 hours) he's so much easier. He is 3 now and still usually wants to open and shut the doors himself and will often start screaming if anyone else does it. But I am pretty sure he's normal.