Generalizing they are a real pain in the arse!!
They miss their food, family, friends etc.
They can be confident with their English in Thailand but the exact opposite in Aus.
Ok for a few days while things are new and interesting but once boredom comes in the emotional roller coaster starts.
They hate being alone in the daytime so if you are planning on going to work or doing anything alone you will regret it.
I know one LB who has been to Australia visiting her friend more than once and she has had no problems with her visa's. She also stays in a semi rural environment so there are exceptions to my above rant.