Unless I get a coupon for a free service, I do all my own service on all of my families vehicles. I figure if I could rebuild and engine, and turn wrenches on a KTM Adventure, I can handle anything that Yamaha can toss at me. If there is a warranty issue the dealers I go to are pretty good about honoring it, even though I do complete my own maintenance. Out of Warranty, my bikes, cars, and trucks, likely never see a dealer again, unless it has something to do with the ECU, and even then, I try to find a way around the dealer.
Personally I enjoy it, put the tunes on in the garage, get the tools out, and go to town. But I am weird like that.
I just bought a bunch of stuff with free shipping from Rocky Mountain ATV for doing my first few services, crush washers included. So unless my S10 has some Warranty issues, it will only be going back to the dealer when I need parts, if I don't buy them online.
I will say my dealer is pretty good about giving discounts on parts and such, if you buy the bike from them.