You're probably right about the cost, and I'm the same way. If it's a minor issue I can fix myself, I will. Especially if it will save a ton of time. Maybe we're wrong for being that way, but I'm glad to know it's not just me....... So, I feel like in the end, I only spent $100 more than I would have going to the dealer. But, I didn't have to wait.
I am at the point when I would only take mine to the dealer in the event of a catastrophic failure. Everything else, I will do on my own.