I had the same thing happen - after a gain of about 15 lbs in 3.4 months (~255-270,) I hit a pretty solid plateau. Appetite decreased, weight gain hit a solid wall.
There are a bunch of things which I noticed contributed to my plateau. My work load changed, I stopped eating out so much, I started exercising more (not a lot more, but I always like to swim at least once a week,) and I started eating different things at home (read: less fattening food.)
I've recently broken through the plateau, though it's taken about a month, and some rather conscious and purposeful (and delicious!) eating.
Bottom line (as far as I can tell): if there's a will, there's a way. If you want to put on more weight, both your body and mind will figure out how to do it. Though it may take some work.
Best of luck!
10 years
