So my current still airing favorites right now:
Arrow, loooove this show! Started out super still but loosened up a ton and has become one of my favorites on right now. Vigilante hero, comic book feel, really interesting backstory and hot guy shooting arrows. Yep, love.
The Blacklist, loving this right now. Not my typical show but James Spader is amazing and I love the female lead. Sooo many twists in it and I want to know everything. Completely sucked me in and that mid season finale? I don't think I took a breath during it.
White Collar, this was a recent one I just caught up on. Love.It. Love Peter and Neal's relationship, love Mozzie and love all the twists and that I spend most of it yelling at Neal to do the right thing.
Suits, I just adore this show. Love the bromance between Harvey and Mike and the dialogue.
Person of Interest, vigilante's with a Malinois and Shaw who is amazing. Can't get better than that.
And last but not least for shows still on, SUPERNATURAL! Seriously, favorite TV show on and very easily could be my favorite TV show ever. Love it so much. Dean is amazing, Sam drives me nuts but I love him all the same (And think he's an amazing actor at playing different people which is good with the amount of different things that wear his skin), Cas is like my favorite ever and Crowely is right up there with Spike as one of my favorite characters ever.
I think the twists they have on the angels and demons is fantastic, I love that Cas is always trying to do the right thing and always making such awful choices but I love him all the same. I think the show has the absolute BEST mix of soul sucking sadness that has you twisted up and humor that has me cackling, seriously, so many great lines and funny episodes. So pretty much, just yes.
Past geek out favorites in less detail:
Stargate! One of my first loves.
Leverage, because Parker, Elliot and Hardison are perfection and I love the vigilante stuff.
Buffy and Angel, I think of them together and there really is no need to explain the awesome.
Gilmore Girls! Seriously, you do not want to know the amount of times I've watched the entire show, season for season, back to back. All the lines are emblazoned in my mind. So many great characters and so many amazing lines.
And Firefly. Because Firefly.