I'm thinking of resigning first thing. I took the Christmas break to mull it over and came to the conclusion that I'm not happy where I am anymore, even if it is comfortable and decent money. Once I'm settled into a new job I'm hoping to get on to the property ladder so I can have my own space. I'd also like to get a bit fitter so if I can find the courage I'll try going to the gym. In the meantime I'll continue with my software projects.
I left my IT job two years ago and things have worked out just fine. I've become a lecturer in further education which I really enjoy. I also lost 70lbs by changing my diet a bit and walking for 45 minutes a day. Good luck. It's a good idea to have something lined up. I had something temporary to pay the bills for six months then took it from there.