College was an extremely impactful experience for me, in both good ways and bad.
The good ways: in making me study things outside my central fields of interest, I discovered new intellectual loves that I probably would never have discovered otherwise. I'm working on a doctorate now in a subject I would never have dreamed I would love so much.
It provided resources -- primarily in the form of professors and libraries -- to learn super interesting things in depth and with rigor. I'm probably saying this badly, but in some weird way this came as a surprise even though it shouldn't have. I went into college thinking of it as this thing to do to learn, yes, certainly, but mostly to get a degree and get a job. But there were all these things I had been kind of interested in and wondered about when I was in high school -- relativity theory, for example -- and I realized kind of abruptly with some embarrassing surprise that, woah, I was in a community that included free (well, expensive, but already-paid-for) access to experts in this and in almost any other subject I might be interested in. It's a tremendous resource.
And, of course, the friends. I met a ton of interesting people who will be friends for the rest of my life, and had (and have) innumerable interesting conversations with them about every subject I love.
The bad ways: it narrowed me. This, in some ways, is by design. If you're going to become really good and educated in something, you have to focus on it, and college makes you do so during your last 2 years, at least to a degree (a much smaller degree than grad school). But there's no question that I was able to educate myself in a much broader array of interests when in high school, and some of these atrophed in college (some have returned since; others have not, at least yet). Worse, this wasn't always for good reasons. Some of college work seems to be more to keep you busy than anything else, and when that busy work is robbing you of time that you could use to pursue other genuine passions, I think it can be very unfortunate. In extreme cases, where somebody has a great passion / talent that does not mesh well with an academic discipline, I think it can call into question the value of attending college at all.
Related to the above, I actually became a worse writer in college. This is probably unusual, but is related to the fact that I was a science major, and the kinds of writing I had done before were kind of pushed out of my life. This was ameliorated a little during my professional degree.
I think that, if you're in a creative field, college can be somewhat stifling. Academics encourage discipline and rigor, which are excellent attributes in many contexts, but I think can dampen a creative spark. This is outside my own area, and I'm speaking based on having observed others. Some on the site may disagree with me on this.
Overall, I've been tremendously happy with higher education -- hey there has to be some reason I'm still doing it all these years later, right? The intellectual doors that college opened have been tremendously rewarding, and have largely shaped my life ever since.
Good luck! What are you studying, if you know?