I do 90% of my own work. Ducati valves scare me...

Not a dealer but I go to a mechanic.

I'm mechanically challenged and own no tools. I'm trying to learn though.

I adjust the valves, change most of the fluids on everything thing I own.

Throttle bodies, abs system, and clutch fluid is the only thing I don't do myself on BMW.

Do most myself. Go to the dealer if I can't do it; TPS reset and headlight recall so far.

So far our 07's bought in 07' have never been back to the dealer. I do it myself...so far...so good. If I need a tire mounted I take the wheel and old tire off of the bike and take it to a shop and have the tire mounted/balanced and then take it home and reinstall it myself.

Maintenance(oil, brakes, plugs...) is always DIY. If under warranty, let the dealer fuck with it. Tires, that's also a job for the dealers.

Most stuff, Chris does. If he can't, then we take it to our friend Jimmy's.

It depends.
I do most stuff, but anything really big or requiring special tools, I will take it to a mechanic(but not a dealer)

I am learning to do it all myself or with the assistance of friends or my mechanic, the FIL. Havent found anything between the 2 of us we couldnt fix yet.

The few times I have let a shop handle my bike didnt go so well. Crashed it once, tightened everything to the point of damage another time, failed to finish maintenance another time...

dealer does recalls and the first service. I do the rest.
Thinking I'll get a NoMar when I build the addition on my garage.