I don't watch it, but in one of these days I probably will, starting with the very first season.
Swedish cable has been extremely boring for the past few months. Also, they took out David Letterman from one of the channels and moved it to digital network (which I still don't feel for swapping to)...so basically everything that I watch, I don't have anymore. This even includes Scrubs. They only do re-runs and it will take a really long time before season 5 gets aired around here and when it does - it will be probably once per week.
But thank our dear belowed God and torrent p2p sharing - I think I'll just make myself my own "tv-schedule", if you know what I mean

Next it will be probably Scrubs s.5 and I still regulary watch Letterman (HDTV-source too, okay, encoded in regular format, but still - the quality's good) - only 24 hrs after the original broadcast in the States...
Anyway, yeah, Lost, I'll watch that too... I promise...but I think probably Prison Break will be my first preference when I get there...

Oh yeah, this reminds me I need to get few of those late 90s seasons of The Outher Limits - I really miss those series - very good!