Most publishing professionals feel the same way as me. Almost all could be making more money and working less hours in another profession. But they don't because they love their work.
Agent Jonathan speaks from passion and I applaud. I love being a literary agent. I did not go to college planning on being one, though I loved books and reading and knew that I wanted to be involved in publishing. When I ended up working at DMLA, the role was a perfect fit. It's me. And no matter how challenging some aspects of it can be or the day-to-day stuff that might bog me down (and about which I might talk too much), it's what I want to be when I grow up -- except I'm not growing up, so I'll just be it now. I know loving what you do is more rare than it should be in this world, so I'll count myself one of the lucky ones.