I, for example, am very turned on by contrasts. So noticeable height differences, size differences (individual body parts or the whole package), skin tone, shapes, etc.
I kinda wish my wife (who’s very pale) were bi because I would love to see her have sex with a dark skinned woman that’s a similar height and weight as her, or a short, petite woman (she’s also tall for a woman).
I love people who love things I do as well. A couple examples from recent memory: I love black metal and I was wearing a hoodie from an obscure band and this guy recognized the logo. We had a long talk about music and that was definitely a huge turn on. I also really love when people geek out about stuff, and I met a guy who’s a mechanical engineer and he was happy to talk about his job and all the things that go along with it.
I guess I’m just describing having a personality.