Lost had me addicted since the fourth episode (Walkabout). Aside from the first few episodes of Season 3, and a handful of others here and there, the show is excellent.
I'm continuing S7 of Buffy. It's pretty solid. I enjoyed Conversations with Dead People. Not sure how I'd rank the season overall, but so far definitely above 4, and probably above 6.
Also, finished off S2 of Rescue Me. It's consistently entertaining, but I wish Tommy and the others would catch a break now and then. What happened to Tommy's family at the end was almost too much.
Just watched an episode where Gene was on a week off... and the way he acted was so much like when my dad is on a week off. It was hysterical... and a little scary. XD