Which new OS should I move too?

I need a new OS on my main box. Something technical that will give me a more in-dept knowledge of the technicalities of Unix and Linux.

I'll be attending a grey hat boot camp in a few weeks. What should I compile?

I'm a newbie to network OSes and the only Linux I use extensively is Ubuntu.

>>3

BSD vs Linux flame wars apart....

....what are the benefits of BSD and vice-versa. I never gave it much thought cause I was always centered on home computing where imo linux is much easier to use.