What are the most common problems with the 1995 Buick Riviera?

The coupler in the supercharger! It gets worn and the supercharger sounds like it's grinding rocks, it's common rip off saying they need a new unit, and installing a 40 dollar coupler. The blower motor control module located in the passenger floor board is also a common issue, it can go out and make the blower motor stay on even with the car off, or just not work at all. It also seems the control arm bushings wear out quickly, but they can be replaced on the 1995 (newer models have non serviceable units). Also the 95's don't use dog bone mounts, and the lower mounts often go out and need replaced. On the non mechanical side, my doors freeze shut and its scary tugging on that plastic door handle to open them.