I've yet to watch some of the early Angel episodes and missed a sizeable chunk of Buffy Season 4, both in the original airing and the (as yet, only one complete) rerun - and Angel Season 5 only just started airing here.
Well, Season B4 was the weakest of all IMO, so I'm not having fits about that... I did have a fit, though, when my SatReceiver chose to malfunction the night that "Peace Out" first aired, couple of weeks ago... I could only see the first five minutes or so, an that's one of the eps that I definitely didn't want to miss. ::grrr::