Looking back on this thread again and being similar to the OP, I would like to share my thoughts. I started off college being painfully shy and studied close to 12 hours/day. I then realized that I had to work on my social skills.. for practical reasons, like networking, interviewing for jobs, etc. But I had no interest in things normal people like (watching movies, TV, listening to pop music, etc) and had no non-academic hobbies. Thus, socializing was extremely difficult for me. I changed that by getting involved in a sport. I met a lot of non-physics majors and made decent friendships with some of them and a lot of acquaintances, but towards the end of college. However, being in so many uncomfortable social situations got me really depressed and my grades suffered. It dropped from a 4.0 to about 3.6
So I screwed things up. Ideally, I wished I had spent my early college years socializing and, after building up the bare minimum social skills needed to be 'healthy' and helpful for practical purposes, I should have spent my later years studying close to 12 hours/day. Thats why I'm really jealous at people who do really academically and still have good social skills. They developed them at a younger age and didn't have to waste time in college to work on them. As a result, I got admitted to top-20 physics and math schools, but didn't get to any in the top-10. I don't know if I made the right decisions or not as it really hurt not getting into any top-5 or top-10 schools. I'm not painfully shy anymore and have gotten past interviews to get job offers. But I paid a big price, considering that my social skills are still far from great and my odds for becoming a professor are now dramatically reduced