DS is 10. I control what he eats in that I try to make it a balanced diet, but at weekends/school hols, if he makes himself a sandwich he chooses. Obv, if we eat together (most days) we all have the same meal. I don't make him at anything he doesn't like.
When he eats, because meal times are meal times (altho he is allowed snacks sometimes)
Bedtimes: definately controlled by us, because he still doesn't know when he is too tired.
TV/Computer/Wii time, again controlled by us. If we didn't he would honestly spend all day in front of the screen (I know, cos occasionally I let go a bit, to see what he'll do), and then be really unco-operative & nasty tempered.
He does decide his own clothes on non-school days, He decides whether to come to the supermarket with me. I give him free rein over when homework / guitar practice are done, altho within that I say "if it hasn't been done by x time, I will insist it is done then".
I can see bedtimes etc being controlled by me util 13/14 at least.