Ok because it would be funny, here's my extremely incorrect head canons on the dragon ball (z and super) villains dating anyone
Frieza: If you can get past the evil I actually think he might be shockingly decent? Possessive to an UNHEALTHY degree obviously but if you meet his standards he'll wanna keep you around. He DOES have people he listens to/likes and he can be genial as long as you don't cross him. Probably smooth and refined with any flirting. Also expensive gifts, regardless of your actual tastes.
Cell: The WORST, and I'm saying this as a Cell fucker. If somehow this bug man has decided he likes you it is SO over for you. You're his now and you don't get a say in it. The only good part would be that he's easily distracted by praise, and will probably return it to you. Probably. Again he's the worst.
Super Buu: Have fun being this guy's pet! If you're unfortunate enough to get his attention somehow you'll live, but you may not enjoy it. If he's not fighting someone he's probably got you in a death grip, this man is super tactile. Terrible, but somehow less condescending than Cell.
Ginyu: Genuinely a good boyfriend 10/10 the best option of the villains. Even if you're on the good guys side, it'll confuse him, but he loves someone with convictions. He would love to compliment you and brag about you to his men. Who naturally would probably also adore you, because if their captain likes you then you must be pretty great!
Hit: Honestly he barely qualifies as a villain, but what the hell let's talk about him. He's kind of hard to pin down, I feel like if he did catch feelings he'd be super devoted. Even if he's away most of the time when he's not on a job he's probably thinking about you. He probably appreciates the opportunity to be gentle with someone. He knows he can't be around often, so he probably gives you stuff to think of him/show his affection.
Zamasu: If somehow you've got his attention he's so down bad and so mad about it. You're a mortal, he shouldn't care, but somehow you worked your way into his heart. So now you're his special mortal who no other mortal can compare to. He puts you on an unimaginably high pedestal, even if you disagree with him he blames it on "other mortals corrupting you." He simultaneously disregards you and treats you like the greatest treasure there is. Like Cell and Frieza he's extremely condescending even if he thinks he's not. He's the worst.
Goku black: A lot of second verse same as the first with this one in regards to him and Zamasu being the same guy. There are a few differences. Goku black is WAY more touchy, and smothering in his affection. He will probably share you with his other half so... Good luck.
Jiren: (again barely a villain but whatever) Honestly? Probably really awkward. If he decides he likes you he won't really know what to do, so he'll just do what makes sense. Which is just walk up and tell you directly. If you agree to go out with him you'll have to take the lead, but he honestly doesn't mind. He knows fighting, he doesn't know relationships. He's just happy to be around you.