This is like asking, "What do you prefer, sweet, salty, spicy, or maybe sour food?" To which I'd answer, "As long as it's tasty, bring it on!".
No, really. I like tough, muscular guys like Brad Evans from Wild Arms 2; short, tiny guys like Yami Yugi from Yu-Gi-Oh!; bishounen types like Kurama from Yu Yu Hakusho. Each has their own charm and are beautiful in their own unique way. They all have a bright brain, so maybe that's more of a turn-on for me.
I do not like shouta, though. My "food" has to be ripe