My favorite Umps always : Were consistent. Gave the Edges (again, if not consistent at least!), communicated with the players and coaches and not afraid to ask for help from the other umps. I literally had an ump blow 3 horrible calls and refused to get help from the plate ump (and the plate ump even admitted that he would have overturned at least one of the calls but can't do it on his own.)
I always joke that I bring a saddle to the games so I could ride the umps. When I coached for sure.
But they are volunteers and/or get paid very little to sweat their sacks off and get beat up as bad as some catchers. In the end my son always shakes their hands and I pay them the respect they deserve. I have seen parents literally chase umps to their cars bitching about the game.