Okay, I know everybody is going to laugh at me for this, but...Friends. I never saw a single episode of that show until 2002. I watched a re-run of it by accident one day, and then started watching it at its regular airtime on Thursday nights. Just in time for the last two seasons.
King of Queens is on Fox when I get home from work, so I've gotten sucked into that one as well.
I also love Get Smart!