...when every time you plan a big event with the car, some combination of vehicle-crippling events occurs to make you garage the thing and miss said event.
Don't even ask how many times that's happened to me. I consider it top luck that the car made it through the cross-country trip without serious incident...
Side Note: Why does no one in SoCal carry an o-ring that's 15mm x 11mm x 2mm!? And why don't any Subaru dealers keep the damn things in stock!?