Second thing I miss about being a student is the general freedom of time that it affords. Sure, I admit that I spent more time playing video games than actually doing anything useful back in university. But, considering that I had almost no money back in university, I could pretend to excuse myself. Now, if I did have money back in university, I would have started my wargaming collection earlier. I would have started buying more books earlier. But, I miss the free time to play video games and read all night long.
Third thing, I realize I don't actually miss university. University was a horrible place with horrible people who thought what they did to their bodies was considered fun. I came for my classes and went home right after.
I don't recall ever having many friends in university than I did outside of it. Being one of the more intelligent people, I admit people sought my help more times than I can remember. And most of them got good grades because of it, but I doubt any of them even remember how they would bug me endlessly until I helped them. And, there were a few select people that I actually called friends, I was rather picky with the people I spent my time with. So I admit, I miss the idea of it, but I'd rather not go back to it. Not even if you paid me to.