Ha, another problem I've never had - I could put on 10# just walking past a pecan pie
Not the good kind of bulk, of course. But I spent most of my twenties weighing in the range 260-280#. My body seems to get comfortable there, if I let it be - wont go much lower without focus on what I'm eating, but wont go much higher either, even if I'm eating poorly. Some kind of metabolic muscle memory or something.
I'm in the high 230s now, trying to push it down under 230. Doing the whole tracking calories thing. It sucks, but it does work... eventually.