I have friends who study abroad (US), and their experience is totally different from mine. Mostly because they actually live on campus, and I still live at home and drive to school.
I personally love uni, subjects are actually focused on my interests, and I get to talk to industry professionals/scholars daily. I am biased because I've always enjoyed academic spaces, but the amount of knowledge you acquire just by being around these people is humbling and impressive.
Relationship-wise, for me, it's been positive; I've met some of my closest friends in college!! However! I met my fiancé through a mutual friend outside of uni. What I mean to say is don't put all your eggs in one basket, expecting to build a friend group/find your life partner in university, because it's just as tough to do at school as it is elsewhere. Also, it's normal to struggle with balancing older friendships and newer ones- it gets easier, don't sweat it too much.
People are still people (friendships are messy, even in adulthood)- lots of folks are friendly, but some are a little prickly!
Most freshmen are as mature as they were in their senior year of high school. I think I only felt my prefrontal cortex start developing at the very end of my junior year lol.
I don't know about the best time of your life. I think for most people, this idea comes from finally enjoying the freedom inherent to being an "actual" adult while still being young enough to not be burdened by too much responsibility (i.e., being in your 20s).
Hope this didn't come off too negatively, I genuinely adore uni!!
Sincerely,
- A TA, researcher, and event organiser for my school :)