I hate it when a good show gets shuffled around. It's bad enough if they change the night or time for the start of a new season, but it's just impossible when it happens almost week to week, which has been the case with some shows.

The other thing that really ruins all chances for a good show is presenting the episodes of a new series out of order. Trying to get to know new characters and settings when carefully plotted out arcs are thrown into disarray is very difficult.