If I were a casual listener, I would bothered a bit by Ayu's diva attidute sometimes though. But as her fan since 2002, I know she's just a diva outside. Inside she's lovely and nice. Actually we never know how she is for real, but I don't think she's a cruel liar whom write meaningful lyrics, sweet TA entries & tweets just for trolling her fans

. Call me naive, but I trust her.
However, I had few experiences about that with japanese people.
I met just one Ayu fan like me, the other japanese people I have talked to said she's gorgeous and talented but they don't buy her CDs.
As for western views, sometimes I had
fights with a friend of mine. A huge kpop boybands and Hikki fan. She said Ayu is superficial because she looks cute on covers, and she will be never like Hikki. Who's the best because she looks natural.
Ehm..

oook.
For other japanese music fans, it depends.
I met crazy visual-kei fangirls who hate her because she sang with GACKT O_O or people who loves/likes her music.
I don't think we can have the same thoughts between japanese and western people imo