I work alone most of the time too.

On remodel projects where there's more than one trade involved at a time, I often find myself working with the local plumber. He lives just around the corner from me, and we get on fine, sometimes borrow each other's tools, but no problems.

The GC I did work for up until he moved away last year annoyed me at times. One day he asked if he could borrow a screwdriver, and I later found him using one of my large fully-insulated flat-bladed ones as a concrete chisel! [Linked Image]