same here - i watched a few of the first season when they were on TV, then borrowed the dvd set off my g/f's brother.
Talk about hooked - "just one more, just one more" until 5am eyes hanging out of our heads lol
Damn good series.
imho its better to watch the entire lot like that in a few sittings, rather than catch each show week by week with all the adverts and shit inbetween