I have thought of this many times over the years. The biggest problem for me is trying to work around the rest of life, and sometimes it feels almost impossible to actually give music a 100% effort. My local band is a lot of fun but we have so many weaknesses that I go from loving it to hating it on a weekly basis and sometimes the fucked up schedules and roadblocks discourage everyone. I have quit my current band once before because I could not dedicate to it but the weird thing was that after a few months it moved up a few priorities because I missed it and I actually re-arranged other parts of my life to get involved again. Music is kind of fickle like that, sometimes you want out but then once you are done with it you feel like a part of you is gone with it. I've found that sometimes I just need a change of pace, to go into different genres of music I love and get inspired to play again. I'm primarily a vocalist, and in the end when I actually sing or growl or whatever I feel awesome, it's almost like releasing a pressure valve. It feels even better when the project comes together and you feel proud of it. I know I'll probably never make much money at this, and so I choose to look at it as something I do for pleasure or more of a hobby. So I figure that even when I do want to give up I'm not doing myself much good, I'm just closing down something that brings me a bit of happiness. If your live band isn't leaving you fulfilled you could alway focus on solo or studio bands that won't interfere much with your life or creativity. Sometimes the pressures and responsibilities of a live band can make it more stressful than enjoyable but there are other alternatives in music that you can take at your own pace and still enjoy.