I had no life, and I mean, zero life, while I was working at a broker / dealer (head of electronic trading of all things), and developing my own system "on the side". It was pure ego, really. I wrote a business proposal for the firm, to expand into automated trading (01-02), and the firm (foolishly) didn't want to do it. The executive committee didn't want to pony up the capital to build out the infrastructure. So I was "royally" pissed off, it seemed like a golden opportunity was passing me by. I kinda of told myself "fuck it, I will do it myself. And show these idiots what they are missing".
Usually my day there starts at 7 am (IR derivatives start at 7:30, we all know that), and I work on the desk until 7pm. I phone some food to be delivered to my apt, get home at 8-8:30, and work on my own stuff until 11:30, then crash. 6 days a week.
You know how it goes, you work at least 1/2 day for the "job" on the weekends. Then i went out with my friends to have one drink on sat night, sunday is full blown self work mode. Yeah, it was terrible, I didn't even have time to get a hair cut. But you know, it worked (suck on this, b*tches!) And it was oh so totally worth it.
Oh and my old firm got bought out, and a lot of ppl got fired after the "merger". Boy the ego satisfaction, was too much for words to describe.