Here in Argentina we have access to most of the US TV programs but not from countries like the UK, Australia, etc.
I regularly watch House, Mad Men, True Blood and Big Bang Theory.
My favourite TV series of all time are all the Star Treks (including Voyager), Babylon 5, Friends and Buffy.
Please recommend me a current TV show that I would enjoy.
Easy.
Still, I think looking at his likes, Supernatural is the clear show to watch.
He can watch more than one!
Battlestar Galactica (not everyone was pleased with the ending, but IMHO it was well worth the ride)
Scrubs
I wanted to suggest Deep Space Nine, since I’m going through it right now, but I see you have that covered. Have you ever watched Futurama?
The OP seems to like shows that are smart, funny and occasionally absurd, so I’d go with Burn Notice.