From 30 -60 not much changes. I think adolescence lasts til about 30.
I meet some "mature" younger people, but most are usually into impressing their peers more than anything else. I occasionally meet people in their 20s who can hold a conversation about something besides themselves or pop-culture. Probably depends a lot on if they can afford, or desire a college education. I meet some older people who live in pretty small worlds too. It's all about their kids, or their jobs, money, and car. To each their own. Sure they conversely think I've got my head stuck in the clouds and my priorities are all screwed up. Actually they probably don't think about me that much at all. People have busy lives, their own preferences, and are doing the best they can with what they got.
If I meet someone under 30 I usually leave them alone. Unless they give off the vibe that they don't care about age and seek out conversation with me. The later is usually all it takes for me. If you wanna talk, let's talk. But if you get nasty, see you later. When it comes to older people: I've dated women up to ten years older than me. There's a certain age where people enter a sunset phase of their life and I'm not there yet π
I don't really have a point. I don't understand why people fixate on age so much. A person's worth come from what's written on their soul, not their bank ledger. (Post Coffee Edit: ...not on their birth certificate)