Karthik Subbaraj and Nalan Kumarasami are both the supercool filmmakers of this generation.. and there are some other I like..
I like the following films..
Maanakaram..
Druvangal 16
8 thottakal
uriyadi
Indra netru naalai
Kurangu bommai
Vikram vedha
Aval
Onaayum aattukutyum(my most favourite)
24 (not the love portion)

Tamil cinema has not touched certain genre since now.. I hope this will change very soon as a set of youngsters are now on the field