I USED to ride a donorcycle...but after 5 years of being a firefighter/medic and seeing 7+ donorcycle fatalities (why else did you think they call them donorcycles???) and numerous other non-fatal accidents, I decided to sell it.
I'm sure you've seen some ugly things. No doubt, riding a motorbike is dangerous. So is riding a bicycle. I'm a avid cyclist of 15 years, and a motorcyclist of 18 months. I think a lot of motorbike riders tip the scales into the "donor-cycle" direction by being careless, along with too much speed. And the top speed will make a motorbike fundamentally more dangerous when a crash occurs. However, it's amazing how much more exposed as a cyclist I now feel on non-shouldered roads, where I'd just be cruising safely with traffic on my scooter. In these cases, it's not clear to me that motorbikes are more dangerous than a road bike. In either case, we can be the victim of an errant driver, so it pays to keep "heads up" on what's happening around you.