I prefer young guys. Very much into cub types, such as muscle cubs turning into muscle chubs. Also hot: Ball-guts on skinny frames. And: Skinny-fat! And: Guys just starting out gaining! And: Twinks with bellies! Generally speaking, I like 'em chunky, meaty, stocky, beefy, husky, "built tough", and I go nuts over a belly, be it a small one or one already a bit bigger.
Oh, and I love big dicks. The longer and the fatter, the better.