10 years above or below. Anything else is so weird to me. Like they could be your father/son. Generational gaps are really creepy.
Right now since i'm 21, I wouldn't do below 20 or above 26.
I'm 25, so my max is ten years older and I don't want a guy younger than 21. I want to be able to go out to clubs and bars with my boyfriend. When it comes to hookups, that's a different story.
For me, right now I wouldn't do below 19 or above 25 but when I reach my mid 20s and I'm still looking then nothing below 25 and nothing above 32.
Basically, I wouldn't go for someone way younger than me
As long as you're over 18 or whatever age is considered legal in your country/region, then i don't think it really matters. Especially if both parties are consenting the relationship.