New Haven's great for someone in their 20s, especially living in neighborhoods like East Rock, Wooster, and Westville. A lot of young people around and you'll be walking distance from a ton of bars, restaurants, music venues, etc. Sure, those neighborhoods have a lot of Yale students living in them, but it hardly has any elitist vibe. The downside is that, due to a lot of Yale students living in those neighborhoods, the rent can be surprisingly high compared to the suburbs. But honestly, if you're a single person in their 20s, you'll enjoy New Haven way more than the suburbs - just live with housemates to save on rent.