I would most recommend Parks and Recreation (hilarious, warmhearted, Leslie Knope is pure love BUT s1 is bad, if you need to skip it's okay to skip to S2), Due South (for the amazing characters/ship(s) but especially because of the vids) and Slings and Arrows is a slice of pure goodness, all three seasons. If you do Supernatural, I would recommend S1+2 and then S3 is not good and you can watch S4+5 if you like the show. But S1-2 is most important for vids.

I need to finish Fringe as well and I need to get back to my X-Files watch (I'm on early s2) as well as FINALLY finishing Hannnibal.