You know, I really can't think of anything that my wife actually "bans" me from.
I wish that were the case with at least one thing or another. But honestly, I can't think of anything. I really do most of the cooking, cleaning, yard work, bills, dog washing, and just about everything else. Now, I know what you're probably thinking, I've banned her from doing stuff...huh uh! In fact, I try to get her to do more things, but that doesn't seem to work too well.
Although, one thing does come to mind. When we by pictures and things for the walls, that's her area. She's the one who wants to decide where they go and how they're situated. But that process usually takes an extremely long time (months) and I wind up putting them up myself, only to have her take them right back down!
But I suppose that would be the only thing that I could think of....