New Zealand, Irish, and British accents. Some Australians sound cute, too. Especially from Adelaide and here.
Since I'm no native speaker of English it sometimes is hard for me to pick up accents, but ever since i was on vacation in Ireland i really like their accent (more the southern one, I had difficulties to understand people from Northern Ireland especially the Derry-Area). In German I like the Bavarian dialect (my own) and Hungarian or Czech accents
Scouse and Aussie*. * And I write this knowing that at the other end of the country people can tell which city I was brought up in simply from my accent, so I'm sure it's not all Aussie accents
Why have four people picked Hungarian accents?! There's nothing wrong with the accents, but all the Hungarians I know have learnt a really American accent to the point that they don't really sound Hungarian at all.
Irish, Scottish, French and Swedish accents are my favorites with French and Scottish sharing my number one spot.
I really like a nice British accent. Wait... are we talking about the same Dutch? Most Dutch people who speak English make me cringe uncontrollably :/