I read a lot of references to "hanging in there" for a big shiny jet and high salary, but honestly I would be careful. I would never try to quench a fellow aviator's passion but, if you are ready to walk away right now, you will be sick to your back teeth of the whole lifestyle in another 10 years if you stay..... long haul command or not. I am mid forties and working long haul for a very well respected carrier in Asia.......and I am done. At what should be the peak of my career, I have come to the tough realization that it is a mundane, thankless job with no scope for creativity, and it destroys any semblance of a normal family and/or social life. Now, it was all those things 20 years ago also, but with age comes perspective I suppose. For me it is time to let go and enjoy family and friends. I took a 2 year break a number of years ago. I know I will not miss it one bit.
Whatever you decide, best of luck.