Regarding lost- I watched 5 seasons on Netflix when I had knee surgery and then had Season 6 on DVR. Seasons 1-3 were solid, 4 was ruined by the writers strike, and I loved 5. Six was the worst season of a television series I've ever seen.
I also have all 3 seasons of GoT on Bluray, I got them all super cheap too. I bet I paid under $80 for all 3. I'm going to start watching them again soon.
I just finished season 5 of Dexter, but canceled Netflix to grab HBO and catch a few of those seasons while GoT is on. I've enjoyed it up until then, but hear it's downhill from here on out. I feel like they should have waited a season or two to kill Rita, but it's based on books, so I guess that's what they are supposed to.
The Walking Dead has been brutal this 2nd half of the season. I've been bored out of my mind watching them, and I watch it on DVR. I'm hoping it picks up with the new characters (One of them, which I loved in Band of Brothers, by the way).