I am 31 and started on PhD 1 year ago part-time. I am an engineer at a large Chip company with an excellent pay and a very understanding manager who's actually supportive of my decision to get a PhD although I don't need it for my work. I feel like if don't get a PhD, I'll end up regetting it for the rest of my life. But then I tell myself what kind of an idiot would put him/her self through the hell of a PhD? someone who really like it, I guess.
Any part-timers on this forum who can offer advise/insight?