Yeah, this AA thing is giving me major headaches as well (right now, AA is my biggest loser--in part due to a flopped set where I justifiably played for stack but got flushed, but also in part due to overplaying the overpair).
Anyhow, as a result of this, I stopped re-raising for a while, but I didn't really like that either, although my current attitude is to re-raise only the crappiest AA hands as well as big wraps and double big pairs--not sure about that one either, though.
In any case, I don't think re-raising can be a mistake with AA.
Ok, so now you have it HU. Well, I tried just checking it down without improvement and got into trouble with that. So, my current revised version, which seems to be working but is still very much a work in progress, is to make about a 1/3 pot CB pretty routinely to see where I'm at.
It's a pretty small bet (but, hey, AA is only a 60-40 favorite over a LOT of hands), but it's enough that they'll generally fold crap, and if they just flat call, you can also get a feel for what they might have.
I had one just now where I did that, got a flop caller, then the guy potted a blank turn in a $100 stack ($200 game). I re-raised him and was indeed ahead. But I felt like he was trying to put a play on my AA, and he was.
The thing about potting it is that you really only get a caller here from a hand that's ahead or favorite from behind, and that just happens way too often.
Anyhow, I think I would have made it $25 or so in this situation. If he comes over the top, you then just have to determine whether you're beat or whether he's making a play at you...
Even $20 might be enough here.