I'm pretty tolerant with what people want to do. I usually request that they get any personal taste/decorator items like fixtures. I also ask them to get dimmers so I don't have to warrant them.

If they're a pain-in-the-butt-save-a-few-bucks-on-materials-guy, they usually also like to watch my every move to learn how to do it themselves. I give them a partial material list, then send them to the store often to keep them out of my hair. I also try to keep any money they're trying to save by buying the materials themselves.

Dave