I've had some pretty long commutes in the past because my work location changes every few years. I enjoy the work, though, so that helps, but I've still been feeling the OP lately. I'm in my late 30s and I don't have kids and "fun" doesn't really do it for me anymore. More and more I need to feel like I'm doing something worthwhile instead of aimless hedonism. I'll figure it out, though, it's just time to make some, as you say, necessary changes again.