If I was brutally honest....
"Mature beyond my years 24 year old woman. Have my own job, don't need your money. Have my own car, don't need yours. Have my own ambitions so don't expect a housemaid or baby machine.
Don't underestimate my intelligence or expect me to play shy-princess. Don't rely on me - have your own life together before you even think of dating me. Don't expect me to rely on you and be needy - I don't need you or anyone else, if I spend time with you it's because I choose to, not need to. If I find you interesting, kind, friendly and intelligent enough to use some of my rare free time to chill with then I will. If it's anything less than brilliant then I won't because I have about 2 free hours a day and I'd rather watch Netflix in my pjs on my sofa by myself in the evening than waste it making polite small talk in a restaurant with someone who is a douche and wants one thing.
Basically I can look after my self and would prefer someone who can look after themselves too because I'm not your mother and I'm also not something you can use for one night.
But in reality I'd probably write something about my hobbies and pets and that I'm looking for a nice mature guy lol.