I sleep 6.5 hours per night regularly and I really, really like it. As long as I'm motivated (I work on something I REALLY enjoy working on every night and morning) and have specific goals for the next day (which I write on a Post-It note the night before), it's not at all a problem. I also find that the later I stay up, the longer my brain has to recover for. In other words, go to sleep early (before 11pm, 11:30 max) and you may find that you function perfectly well on less sleep.
By the way, I've tried the Uberman/polyphasic sleep schedule, and while it was really, really interesting (I had lucid dreams for the first time), I found it to be too unstable. It's probably worth trying one summer if you're really curious, but it's probably unhealthy for your brain if you're too young (under 18 especially).