Seinfeld is my top favorite. Best show ever in my opinion.
Others (in no particular order)
-24
-The Drew Carey Show
-According to Jim
-Family Guy
-Everybody Loves Raymond
-Becker
-CSI (Vegas is my favorite of the three, but Miami is ok)
-Simpsons
...and, although it's not a particular tv show, I always enjoy watching hockey. It's my favourite sport, and I watch it a lot, even if the local team isn't playing. Hey, I'm Canadian, so that's kinda how it works, right? =P