I've been reading far too much about the downsides lately when trying to decide if I want to do it, so this was a fun diversion. I'm 28, fresh out of a CS MS program, work full time at a job doing computer security 'research' and really still feel like I don't know as much I as I want too.

Interesting, the question about family/friends is what peaked my interest. My girlfriend of 10 years is about ready to kill me if I commit 4-6 more years.