I guess, Kareena was great in each and every movie and she always took one step ahead with every movie she did. I loved her role in OMKARA where she has potrayed very difficult character of Dolly with such a ease and ofcourse without putting any make up.
My favorite Kareena's movie is Chameli. I don't know how you missed out on this movie! Till I saw Chameli I too felt she was not 'that glamorous' that she was made out to be..!
Infact,I considered her as a 'poor sibling' to Karishma in terms of beauty and acting. But 'Chameli' changed it all. She was 'just superb' in it.Hope we get to see 'such movies' from her very soon.
Well seriously, I think that Kareena's best performance is yet to come. As for her past performances, I think her best would include OMKARA and DEV only. The other performances are best forgotten, including CHAMELI and K3G.