I've learned to do all my own maintenance with the exception of wheel building. I do true the wheels and I have rebuilt the rear hub in a Mavic K10 but never built a set from scratch. The first time I tackle a job it never goes totally smoothly but it's a learning experience. I stressed out over replacing the BB on my TCR but that job was a lot easier than I expected.
I just couldn't deal with the turn around time on service. Not to mention the LBS is over 30 miles away and the local shop has really sub par wrenches. I've invested in tools and with the web and forums there's a lot of info if you choose to look for it. Besides like others have said it's a good feeling to be able to keep the ride humming. My new bike has DI2 so that's another learning curve to deal with. Fortunately they're pretty much maintenance free.
