Breaking Bad - currently the best show on TV, about a chemistry teacher who gets diagnosed with terminal cancer, so starts cooking meth.
The Shield - Great US cop show, watch the first episode and if you don't like it, don't bother, but you should like it. I'm currently watching it all the way through for a 3rd time.
Rescue Me - About a firefighter in NYC, has had its ups and downs, but overall a quality show. Final series starts in 8 days.