Well, Doctor Who the Reboot Series is number 2, I just cant get enough Who.
The third place is for Heroes: Season 1--again, another show that not necessarily went on for too long--but actually lost its way after season 1. It turned in just another Government vs Mutants piece of crap. But season 1 was outstanding, and I could also pick out a few episodes from the other seasons that are not too shabby.
Those are my top three obsessions, lets call them. As in I find out all I can about them and will follow them anywhere they go. As I did withHeroesuntil it was now cancelled, (heard news of a mini event closing up the series, cant be more glad). And until Who ends, hopefully not for a long long time, and SPN until it ends in Season 6 or continues on.
Although you didnt ask me, out of obsession zone: my top five shows are (in no specific order):
2- X-Files (until season 7)
3- True Blood
5- Smallville (every now and then it annoys me though)
This does not consider anime, of course.
An honorable mention is Charmed, who stuck around for a bit too long and abandoned the "actual" witchcraft mythology that it greatly began with. Let's call it the "Longevity Curse". Shows that stick around just a bit too long.
What are yours?
Don't laugh at me but Supernatural, Everybody hates Chris, and I kind of like the vampire diaries but at times it gets too lovey dovey for me so I change the channel. I mean I usually don't like shows and movies with romance being the center but instead just part of it.