I get tired too... But only after I had spent all night changing an engine on a 737 and then watched as the crew flew it away. I also get tired of flying an ILS down to mins in a tri-jet level "D" sim and then not be able to go do it in the real thing. I also get tired of giving technical (via satcom) advice to flight crews winging their way to HKG while I sit in a windowless office.
I have weighed all of the pros and cons of flying for a commuter and the pros far exceed the cons.
Recently, I was giving dual to an orthapedic surgeon and he had made his mind up to pursue an aviation career full time. This individual earned over 300k/yr and was prepared to take a massive pay cut with the full knowledge that he may never make that amount again. By the way, we were flying his shiny Diamond w/ MFD and downlink wx. Obviously toys like that are not enough to keep him in his current profession.
My point is to reinforce that age old adage "Do what your heart leads you to". If you are truly tired flying and not just in a temporary funk, then you probably should get out of the business. Hopefully you can find what really trips your trigger.
I notice that guys like "Tony Montana" and "Skyhigh" frequent this site and post much. Their heart is with aviation I think. In fact, I appreciate Skyhigh's point of view and believe he is a true friend of aviation. I would give him a job flying if I had the power to do that.