I love my job, it's by far the best I've ever had. Most of what I like if how flexible it is. But work on you're own is good that way.
The only thing I dislike is the shear amount of driving I do. 
I drove a truck for about 20 years, averaging 80,000 miles a year, 6,000-7,000 miles a month, 1,500-1,700 miles a week. My weeks were 3-4 days, so on one week, I worked 3 days and drove 1,500 miles, the next week, I worked 4 days and drove 1,700 miles. I worked 40-50 hours in those 3 days, 50-60 in 4 days.
All total, I figured I've driven 2.5 million miles in the 36 years I've had a license, more than that if you count what I covered driving farm tractors and trucks, motorcycles, loaders, dozers, combines, etc. I've got over 100,000 miles just on motorcycles in off-road competition.
Now THAT'S driving, but it doesn't come close to what a friend of mine that's a long-haul trucker covers. 1,000 miles/day for him is loafing.
I currently drive 100-140 miles a day, six days a week, working 60+ hours a week, AND I LOVE IT!