[nounaut]

If you're being asked to work outside of office hours alot, then no matter what your job or position is your company has an efficiency problem and that's something that should be addressed for the good of the company.

If you're changing jobs alot because you can't find one that suits your needs then you should be more aggressive and thorough in your search. Let those companies court you, not the other way around, and get everything you're hired to do written into your contract. If you're changing jobs that often just because you're supposed to in order to be considered successful then that's probably the biggest problem.

Freelancing is an option I guess, aswell as starting your own company without the intention to sell. That still makes for alot of work on the business side of things though.

Lastly, you seem like a guy who doesn't have too much trouble finding a job so risking your job by saying no seems like a small risk to take considering what you could gain. Also I'ld say that 9 out of 10 times you're just calling their bluff. You are an investment for any employer. If they lose you after 1-2 years they've basically thrown every penny they've ever given you out the window.