as Noob said Revolution is good. Here's a list of my favourites: Breaking Bad The Walking Dead Dexter Game of Thrones Sherlock The Wire Luther The Sopranos EDIT: Enjoy!
Don't forget: Suits Falling Skies Shark House Entourage Eureka Homeland As well as Top Gear though thats not a series in the strictest of senses.
Well have seen all of Hirezo list except The Wire and The Sopranos cannot say i have heard of them lol. In Picarro's list only heard of Homeland, Suits and House, which House i have seen.
Arrow and Banshee are two of the new ones I've enjoyed so far. Justified is also having another excellent season.
http://www.imdb.com/search/title?num_votes=5000,&sort=user_rating,desc&title_type=tv_series&ref_=nb_tv_3_srs Just scroll through and click on any which look interesting. There all be great quality it just comes down to taste.
Community Workaholics American horror story (series 1 is much better than 2) Parks and Recreation Utopia (6 part channel 4 series, was great) Dexter Walking dead 30 rock It's always sunny in Philadelphia Those are all things I have been watching recently.
Depends what blows up your skirt? If it's Criminal / Psychological series, look below, some are a little dated but if you accept that fact, they are great. Wire in the Blood Cracker Waking the Dead The Body Farm Luther Touch of Frost Silent Witness
You haven't seen The Wire? It's quite possibly one of the highest rated items on IMDB, and it deserves to be! Really good show.
Game of Throne The Walking Dead Downton Abbey (You need a bit of relaxation, after watching the previous.) I was following Spartacus for a while but It's a bit too bloodshedish for me.