I come across a variety of sizes, but there are sizes that I use a lot! Mostly your basic sizes to take off and put back on body parts and accessories.
10 MM socket
Most of the time I use this size for most fender bolts, license plates. Door handle bolts and nuts, sensor attachments, antenna's, and inner fender nuts. As well as fog lights, grills....I could go on!
8 MM Socket
I find these on fender's mostly, and bracket bolts.
13 MM Socket
These are mostly bumper bolts, windshield wiper nuts, hood bolts, and some interior nuts like seat bolts and seat belt bolts.
7 MM Socket
Mostly inner fender screws and some license plate screws. I also see a lot of these in the interior panels, like door panel screws and grab handles. Fog lights and some bumper brackets.