Just a round up, because i want to do it.
Cheran - overall i feel he stands out. he does drama/sentimentality - uses it as well a bit. On other hand, he defends everyone in their worst. as he said being middle aged doesnt mean he doesnt even have a shot at winning. He is as nice as his movies are. Inspite of constantly being sidelined and targetted by the them, he still in the game after all these weeks. Most people have failed here.
Tharsh - my all time favorite. looks good, has a good analysis of overall house members. Except when he joined sandy against madhu, his judgement overall isnt too bad. He handled sherin issue very well. ( same place kavin failed - like how kavin said fail fail for some other contestant, kavin is fail fail fail). Quite level headed.
Mugen - kudos to this guy for handling abhi well. Except for her exit week. Apart from it, i dont see him doing much. he doesnt even know sandy and kavin give 2 hoots for him. trusts them.
Sherin - literally furniture. didnt like her when she was with sakshi/vanitha. dont think she is an angel at all. but she has certain charm. like her and tharsh track. really feel she shouldnt have taken in sandy's bullshit when he was initially harassing her in the name of flirting.
Los - liked her initially. But after kavin.. that guy is the really not worth it at all. But totally get when she ignores cheran. Any girl in love would be the same.