I quit my job. I did that because I thought it would be valuable to focus just on the startup rather than have my focus split. It's possible that decision may not have been the best one. I had a job with lots of personal development opportunities and they were willing to let me work part-time on my startup, part-time on that job. In hindsight, that would've been ideal. It might have just been my circumstances, but I think that the two complement each other extremely well. I would have been better at my job as a result of the startup, and vice-versa.

Just do whatever seems to fit your circumstances best. Forget about the startup groupthink on what's better or worse.