Man, I envy you- college was the best time of my life.
I went to college without a real idea of what to study, a kid with a lot of interests. I think that I secretly believed I was going to be a rock star anyway, so my major didn't matter.
I started off at a Franciscan university, with a vague Communications major. I transferred after a year to a college that offered a Music & Sound Recording program, and spent two years discovering that I wasn't all that good at it. The coursework was no problem, but my attitude just wasn't where it needed to be. I was a serious party guy at that point, and it took a semester on probation to get my priorities back on track. However, I don't really regret it- if you're gonna party hard, the first few years of college is the best time to do it.
Luckily, part of St. Bonaventure's requirements were that every Freshman had to take a semester of Philosophy and a semester of Theology...and that became my undergraduate and then my post-graduate field. LOL- it was completely useless from an employment point of view, but I'd also earned a secondary major in Audio/ Video Communications from my other courses, so that helped find work later on.
Honestly, college is like anything else- you get almost exactly what you put into it. If I was going to college now, I'd be a lot more focused and disciplined...but on the other hand, I had four or five great years of exploration, fun, relative irresponsibility and intense relationships. Either way you approach it, you'll have memories to last a lifetime.