I tried to change, I went from working in a bank to being a personal trainer at the age of 30 which i was absolutely papping myself over. I saved as much as i could to live off for a while and decided that i would assess the situation of how i was doing after 6 months, turns out PT'ing in a club wasn't for me, loved training with clients but the ridiculously long hours coupled with long periods of hanging about in the middle of the day (which i knew about and thought i could cope with), i was running myself into the ground and my life was just work 24/7. I decided that i would start applying for jobs again and went back to banking for a different bank i managed to blag an extra 9k a year over what i was being paid and the new place is 15 minutes down the road, i also PT in my spare time and its a lot more enjoyable for me, i just decided i need the steady wage coming in to feel secure. If i hadnt risked it and taken the jump i would of always asked myself what if? Lifes a gamble and not every gamble pays off however do you always want to wonder what would have happened if you didnt just go for it?? Its a scary decision to make but worth it if it will make you happy. I say go for it