Britain is probably the best non-US source for TV (in English for us, at least), that's for sure. However, who has the "best TV" is a different question. If you lack cable in the UK, the standard broadcast pickings are mighty thin. You're far better off in Canada that way. With cable, satellite or digital Freeview, the options improve dramatically - but all are recent developments.
We all tend to think of the UK and the BBC in a very positive way, in part because we see some of their best products over here. When they're good, they are awesome! However, on a day to day basis, not so much. There's a lot of mind-numbingly dull stuff on the telly over there and, when your choices are limited to BBC1, BBC2, ITV, Channel 4 and Channel 5 - well often there's not much on. The last 2 times we were there, BBC2 spent an inordinate amount of time showing a dart tournament! Hour after hour, day after day! We got a kick out of it at first, but after a while it's not too amusing.
Again, they're developing a pretty good list of satellite/cable channels to watch - if you have the service. None of the hotels I've ever stayed at have had such a service (aside from ESPN and CNNI); and most people we know still get TV from an antenna. In the end, we didn't watch a lot of TV; nor did we plan to.
Canada is still probably better overall - at least for variety. For a country of 35 million, they are well served with dedicated cable channels. From what I can tell, Australia and NZ are pretty grim as TV is concerned.
Japan was terrible for variety (only a couple of channels to watch) - but good God their infomercials are hilarious. Done in front of a studio audience, you hear exaggerated oooohs and aaaaahs and then, when the price of the item is revealed, it's as if someone scored a goal (the crowd goes WILD). One of the (unintentionally) funniest things I have ever seen on TV!!!
