the U.S. version, in my opinion, is much better.. but maybe that's because i'm american. tried watching the UK version but i didn't get it.
Blasphemy! If you don't "get" the UK version turn on the bloody subtitles, you wanking gobshite. 
I'm American and can't imagine Shameless outside of Paul Abbott's Manchester. Frank and his neighbors without the pub and northern brogue? GTFO! Why not just watch Rosanne reruns?
OK, OK, I'll give it a chance, but I'm 100% sure it will be absolutely awful.
I'm still undergoing intensive therapy as a result of what Hollywood did to my beloved Life On Mars (Harvey Keitel nothwithstanding)!