Tonberry, lot's of english speakers there from AUS - but expect about the same level of salt you get on Balmung (from everyone, not just Australians). Honestly, the idea that JP servers are friendlier than NA or EU servers is more about perception than reality. English speakers on smaller servers typically don't do things to piss each other off because the population of english speakers is so small. But if you know Japanese (or enough to get by); you'll find that there are arrogant Japanese players too - quite a lot of them and they can sometimes get pretty nasty. This is a minority though just like NA and EU and for the most part are willing to help out and even help with the language barrier. If you're just looking to move to a JP server to try to avoid conflict, find a friendlier server in NA (smaller servers tend to be more friendly for NA, EU and JP DCs).

The two biggest problems you'll run into on JP servers is language barrier and lag. If you have a gaming VPN, it tends to make it more bearable; but you'll still have lag issues. Another issue is the market on JP servers. If you're a crafter, you'll likely see between 20-30% less for most items on JP servers - especiallly food and pots. My advice is to create a character on a larger server on the JP DCs and spend about 6 months there before committing to a sever transfer; a week or even a month isn't enough to get a feel for how the community is overall.