I think I have very conventional preferences. I am a conservative person and prefer order and tidiness, within reason. I don't obsess about dirt, bacteria or risk for infections. I don't worry about becoming ill, even when those around me are ill. If it happens, it happens. My preference is for lack of clutter rather than with the absence of dirt.
I prefer routine and knowing what is coming. This is to a degree, as absolute predictability becomes boring. But, I like to have a set routine and usually stick to it. I like to have a rough idea of tasks to be done and people to be seen. I don't respond well to loose plans and waiting around. I think my time is important and I want others around me to think so too.
As for the "turn-ons", I like "innocence". I would rather date the good-girl-next-door type than a party, get-around girl. I would rather see a nicely-dressed lady who is more covered than a sloppily-dressed girl showing more flesh. I like subtlety rather than all-out-there. I like a build up (short glances/smiles, leaning in toward me without touching) rather than the blatant come-on. I like naivete in a woman rather than "worldly". I like someone I can impress rather than the very-accomplished woman who might not be easy to impress. I like clear, taut skin rather than sun-blotched or saggy skin. I like a summer dress rather than a thong. I like pubic hair rather than the plucked-chicken look. I like a woman who will say, "Pardon me" rather than, "I need to get through here." Go light on the tattoos and piercings. Don't let me think you've "been there, done that", as I'd like some firsts to do with you. Don't say everything you think, and have a way of communicating without spelling it all out. Subtlety, expressive, innocent, sense of humor. Those are turn-ons.
P.S. There aren't any objects, pieces of clothing or activities that are can't-miss turn-ons for me. It depends upon the lady and the situation.