I prefer around my age to be honest, although my SO is 2 years older than me. Won't really go for much older than that. The thing is that a lot of guys tend to mature slower, and to be fair even my SO can be pretty immature sometimes despite being older than me. I don't personally mind too much but some girls do and prefer a more matured man rather than a boy.
i can't really speak for others for me. I am just not attracted to men my own age also i have nothing in common with them. They are highly immature and I don't mean silliness I mean in how you approach life and everything.
Although the main reason is I just am not attracted to men my age.
They are more mature, and often do take responsibility. My boyfriend is 7 years older, though I never had the intention. But he cares for me, and supports me no matter what. I have health issues and he's one of the few that can cope with it.