Ooh, everyone should do this -
this is me. I swear to God I don't sound like that normally.
Also, in terms of English-speaking countries, I like Irish and Scottish accents. I also quite like a certain kind of American south accent, not the extreme redneck type but that kind of relaxed drawl you hear from time to time. I don't don't know the geography well enough to be specific. The Newfoundland accent is excellent as well, but in a different way...
Amongst the worst to my ears are Welsh, Scouse and Brummie.