Well, when you get up to speed with the back-log of programmes to download, I can recommend the following sites for just-released TV episodes.
http://www.next-episode.net lists programmes just aired, and you can select programmes that you're interested it and it will highlight these, and let you know when they will be aired. Free to use and useful to check what's up and coming.
I use
http://www.eztv.it to download the tv progs - they are pretty quick with the uploads.
If you're interested in UK tv, another option is UKnova.com - again free, but you'll have to register and the membership is limited.. but if you persevere you'll get on.
If you haven't watched it yet, I recommend 'The Wire' - all 5 series.
My current list from next-episode (which covers what my family downloads) is:
Burn Notice, CSI, CSI: Miami, CSI: NY, Doctor Who, Grey's Anatomy, Have I Got News for You, Hawaii Five-0, House, Law & Order: Criminal Intent, Law & Order: Los Angeles, Law & Order: Special Victims Unit, Law & Order: UK, Little Mosque on the Prairie, Mad Men, Memphis Beat, Merlin, Private Practice, Psych, Royal Pains, The Apprentice UK, The No. 1 Ladies' Detective Agency, Top Gear, V, White Collar
I'm sure you'll find something you'll like in that list.
(btw - haven't watched Shameless - any good?)
Cheers,
Shafique