There is something to be said for work that requires little thought. I've always found simple work to be very boring. I've always made sport of it. I remember in school purposefully not studying for tests, just to see how much I could remember (I only had 1 B in High School, PE, and I was a 4 sport Athlete). Sometimes I would simply shorten the time I would allow myself to fill out the exam by waiting until there were only 30 or so minutes left. I've always found that work that did not require adjustment or adaptation to be too easy. Kind of like my relationships, if it came easy, I got bored. Something about challenge or expectation of failure that drove me. Sometimes, I feel as though I've lost that edge.
Growing up, I was ingrained with a motto of "Excellence Expected, Excellence Achieved". I always thought that that meant excellence was expected of me and if not achieved, that I had failed. I still feel that way today, though I've started to think that it meant more that if one expected excellence of themselves, then excellence would be achieved. Either way, it sets the bar pretty high.