A few years ago, when my wife and I moved in together, I got a screaming deal on an XJ550, and was weeks away from signing up for an MSF course. We went out to dinner one night, and about a mile from our house saw paramedics unsuccessfully attempting to revive a rider in a motorcycle vs. SUV accident.
Up until that point, I honestly believed that it was possible to avoid all stupid drivers... However, this woman had been riding for 20-something years, was traveling the speed limit, on a BRIGHT YELLOW Honda VFR, with BRIGHT YELLOW leathers, and a BRIGHT YELLOW helmet. There were no other vehicles anywhere near her on the road that she could have been obstructed by. The 93 year old driver of the Jeep Cherokee that broadsided her said "Oh, I didn't see her!"...
My desire to ever ride on the street pretty much vaporized after that... The bike is still sitting at the back of my garage, and although we've never discussed it, I think my wife realized what happened. To her credit, she never brought it up, or "Forbid" me from riding, although I could tell that seeing that accident got to her as well.

