Almost all of Chakrit's lakorns. He has this stuck up snobbish and arrogant personality that seems to always appear. Okay I haven't seen all his lakorns but I have seen a handful. I think his best role was Enchanted Bed. It was the only lakorn were I could tolerate his character.
Khongkwai (Khongklai) From Mia Tieng 2011 is definitely STUPID! ANNOYING! An ASSHOLE! INDECISIVE!
Rhan from KRLJ was at first okay but then his role just didn't make any sense. Okay it is not reaaly him, it is the lakorn that really sucked!!!
Pummareh from Leh Pummareh is just a douche bag. I'm sorry but I don't think I can ever forgive him although it was all his selfish dad's fault for making him think of such a plan to make the 3 sisters fall in love with him and slept with two of them. And then one sister goes mentally all because he drove her crazy, she wanted to shoot him but insteal got the other sister and the sister dies. Good thing he died because he deserved it!!!
Pong's other characters from Buang Kammathep, Tomorrow I'll Still Love You and The Air Hostess. The other lakorns of his I dropped Or have skipped, so I am not qualify to critique.
Win's roles from all his lakorns with Kwan and the one with Pinky.
Mart... Okay it has to do more with his stiff acting than his roles... But I am super annoyed at him in RP, the lakorn with Susie, and Tard Ruk.
Por's character from his lakorn with Taew. He thinks too highly of himself!!!
This is just the few that I have named. There is quite a lot of stupid pra ek that were highly annoying from start to end.