He occasionally (almost compulsively at times) gives advice on better ways to do things, or even just to do things. Particularly when I'm driving... Now, I'm a pretty good driver if I do say so myself, but I've always felt it a little weird to have people watching me while I do it, or when I'm eating, too. Actually, anything where I have to handle objects moving around, be it my own body or basketballs... Anyway, he'll quietly say things like, "Woah, stop," if something jumps out in front of me and I act like I don't see it. Or after he saw me parallel park he gave me an impromptu tutorial on the simplest way to remember how to do it right the first time. (What's kind of funny, though, is that in the times where I've seen him parallel park, I've actually ended up doing a better job - probably because I'm a bit of a perfectionist, but still. It amused me a tiny bit.)
An interesting thing about all that, though, is that somehow I didn't end up offended at the instructions. Or even all that uncomfortable, which is
really unusual, considering my dislike of being observed like that.
He has complained to me once about how some people are overly dependent on him, and how it gets annoying at times. I proffered the platitude that starts "Give a man a fish..." and he said, "I
have taught them to fish; they still keep coming back.

"