An assumption that arises periodically and many times recently across a number of threads is that we are all driven by motives such as wealth or power. Now I have no personal experience about being really wealthy. My income has varied between nothing and 350K/yr. The odd thing is that when I made the most $$, I was 1) driven like all get up and typically traded stocks at 4am, followed by a 10-12 hour work day during weekdays, and there was never a day when i did not work, even if that meant simply doing patient rounds on Sunday. My patients thought it was fabulous that they would see the same guy every day of the week. Nursing staff thought it was way hip, too, as thy never were put in aposition of guessing or consulting another doc. Heck i developed grandiose deluisions i was the MAN. But I was so busy making $$ and consumed with investing same that I had no life. I was completely uninformed (Russ W et al might argue nothing new there) but it was an empty materialistic fantasy world, ungrounded by anything of real importance/value. Likely I am still not a huge contributor to the betterment of mankind, but I have since discovered that working 2-3 days a week, and making much less $$ is way more satisfying. I can tutor a bit on this forum, exchange thoughts with the rest of you, and build some really cool rockets. Plus hang out at the Tattered Cover (great local bookstore), watch some good TV and stay tuned by attending to alternative media. I have time to do pro bono work, and serve a dozen or so Colorado School of Mines students where I spend more time talking engineering than about our crummy childhoods--its perfect in many ways. There are some things I would still wish for, like a passioante romance, sufficient wherewithal to do even more outlsndish rocketry, afford health insurance, and even see a dentist. I dine out like twice a month versus twice a week. This is all a long winded prelude to what stirs your own juices? For me its about problem solving--tremendous sense of satisfaction there--relationships, creativity, contribution, and variety. So what floats your boat?