The hardest thing for me the girls were uglier and less friendly in college. It took me several years to lower my standards enough to get laid on a regular basis. That probably had more to do with growing up on the beach in California and then moving to an inland engineering school.
Aside from that school was basically the same as high school go to class then go to practice then go home and do homework pass out and repeat. I picked a major which was basically the only decision I had to make with regards to my education they picked out 19 credit hours a semester for me to graduate in 4 years and I got three electives to choose over 4 years.