I, of course, have my favorite TV shows, but I think there are a few guilty pleasure things I watch that I will watch over and over again although I've already seen them (which I assume is the point of the thread...not just favorite shows):
My two are the VH1 "I Love the" series and "The Greatest" series
I Love the 80s
I Love the 90s
I Love the New Millennium
100 Greatest Songs of All Time
100 Greatest Artists of All Time
100 Greatest Songs of the 90s
100 Greatest Hip Hop Songs
100 Most Shocking Music Moments
100 Greatest Songs of the 00s
I have watched all of these numerous times, and I will sit there and watch them in their entirety if I catch them on and have the time.
(Looking at "The Greatest" website on VH1.com, looks like there's WAY more episodes than I realized...too bad I don't have VH1)