1) Personality - Frigid and negative people are not desirable. Personally I like people who are (publicly) somewhat reserved but still friendly and approachable.
2) Smart- A sharp mind is always a good thing.
3) Looks - A girl should look presentable and imo have a "natural" look without fake nails, fake hair color, fake contacts, fake tan, excessive make-up etc.
4) Fun- Nobody wants to be around a killjoy. A girl should be fun to be around and not take things too seriously.
5) Confidence - Somebody who can stand up for themselves in the face of criticism earns my respect.
Tbh I've never even been in a relationship though and I'm 24 and the only girls I've asked out flat out said "No!", so perhaps my standards are too high or I'm just some hideous spawn.