Most Helpful Guy
Age is to a degree. A 50 something having a relationship with an 18 year old is far fetched, but a 50ish with say a 36 year old, I could see. If you're just in it to fuck then any legal age is fine.
Most Helpful Girl
It matters to me. I wouldn't be with someone over 27, unless they look very young for their age or something but that's a rare exception.
Nor would I be with someone less than a year younger.
Also, I can't say it for sure, lol because I liked someone who was 5 years older than me, and someone who was same age as me. Looking at them now, the one that was same age as me turned out to be better in personality and maturity than the older guy.