I usually watch the older shows back from the 1990's and early 2000's.
Somewhat currently watching:
SOME previous episodes of MLP FIM
Adventures of Tintin (1991)
One Piece (just watched one episode after a while)
Archie's Weird Mysteries
ReBoot (awesome cgi for its time)
Aqua Teen Hunger Force (or Aqua Unit Patrol Squad 1, whatever you wanna call it)
South Park (Make Love, Not Warcraft episode)
Video and Arcade Top 10
Whatever else is on Teletoon Retro here in Canada, I will watch.
The primary topic was "What are you watching?" for the topic prefix, but it doesn't have to be a show on TV. What are you doing waiting for the exciting season 3!
EDIT:
I am also playing a lot of games dating from NES to Xbox 360, PS3 and Wii