I was going to say curuption as a negative point but it saved me like 10years of thai prison so pretty meh about it now
Lying stands out for me, thais lie alot about everything. If its lying , telling stories or just talking about things they have no clue about. A thai would rarely admit he doesnt know something to avoid loosing his face, this goes to the next point. Theyre over concious about not loosing their face.
Another thing is supersticiousness, thais are very supersticious and monks have a huge influence, they also believe in ghosts and stuff.
Thai are also racists and nationalists and the whole society is devided into classes. After time you get used to this stuff and it gets kind of funny.
Thais are also very materialisitc and will never mature
Those things can get annoying but the pros outweigh the cons imho and after time all of this gets pretty funny and thais arent very serious people anyways.
However there alot of sad stories in thailand unfortunetly
Oh before I forget it thai arent the people who will get into huge arguments and start to verbally fight like we do in the west. Theyll either stop to talk about , leave the situation or get physical.
The best way to get along in thailand is SMILING