I’ve lived in Manhattan for 3 years now. It’s okay, I don’t love it. I never wanted to move here but I made the move right out of college for my dream job. I’m making under $100k so my quality of life isn’t spectacular. I’ve heard quality of life for a single person is decent once you’re making at least $100k-$120k. I live a 7 minute walk from Central Park and I run the lower loop several days per week. It's great. I will oftentimes run Central Park late at night until NYPD kicks me out (the park shuts at 1AM). I walk to work most days and pass by Times Square, Radio City Music Hall, Rockefeller Center, St. Patrick’s Cathedral, and Grand Central, so it’s kinda cool in that regard. It’s popular to bash the subway system because the infrastructure is in shambles (tons of delays and out of service rails). There are unlimited cool bars/cafes/restaurants, and really hip neighborhoods, so if you’re an adventurous, outgoing person Manhattan can be glamorous.
There are lots of crazy/entitled/rude people here so I’ve gotten great with handling confrontations and dishing out “clapbacks" despite being an introvert.