Let's talk about accents and dialects.

[Lilitu]

I lived in Osaka for a year so I learnt the Osaka-ban, it is called the 'harsh' Japanese and you can hear why when you listen to someone from Tokyo or even the NHK News.

I can hear how it's the 'harsh' one in comparison to the Tokyo dialect, but I don't think it's so much harsh as it is flamboyant or loud. It's not like the difference between South Korean and the north korean we see on TV sometimes, where that crazy north korean newswoman speaks like she's very cross with you. I think it's like how Cantonese sounds in comparison to other Chinese languages, it's the fun one that sassy people speak xP.

I also love the naturally comic accent that Kath and Kim speak.
As for the most attractive I'd actually go for the two that I said were hard to understand: Scotland/North Britain, and the really genial and kind-sounding South USA ones.