This season my top 10 must see is/was:
1. Justified - continues to be the best show I've seen currently on TV (no disrespect to those I have not seen like Game of Thrones or whatever)
2. Person of Interest
3. Fringe - I'll miss this a lot
4. Castle - Nathan Fillion can do no wrong
5. The Walking Dead - the one thing me and my teenage sons watch together
6. Nashville - shockingly good, excellent music, fine acting, reasonable scripts, and Deacon might be the hottest guy on TV IMO
7. Arrow - THIS is how you do a superhero TV series (albeit, it's really a thinly disguised Batman poured into a different costume)
8-10. (tie) Grimm, Once Upon a Time, Revolution - all genre shows (for which I'm a sucker) with really likeable elements (Monroe, Gold, and Miles respectively) and some obvious weaknesses.
there are some others that intrigue me that I haven't had the time to invest, mostly on SyFy. although I'm gonna try to keep up with Defiance.
also, I've been watching torrents of Defying Gravity and enjoying it quite a bit. I think the lead actor is horribly miscast but otherwise, it's quite interesting.