^ ditto on the Holiday watching, I'm already anticipating the Halloween '08 re-watch 🙂
I've done entire season rewatches of Buffy at least 10-15 times. Angel is less, probably 5 or 6 times (I got those dvds later, when I was full-time working and had less opportunity to watch all the way through.)
BtVS seasons have individually been watched in addition to that, cause I used to tape every ep and rewatch throughout the year while waiting for the next season (and so on, watching 1 and 2 before 3 started, then 1, 2, 3 before 4 started etc) and I watch favourite episodes more that that, like I've seen Prophecy Girl probably upwards of 30 times, same with most of season 2 and 3.
It seems excessive, but it's been what, 12 years? That's not so bad (until you factor in all the other things I've watched, then I'm terrible!) and they were often on in the background while doing other things, like babysitting or knitting or studying (pretending to study while oogling Angel)