I invite everyone to post their choices of the best & worst of 2011. Your choices are open to films of any language in India or outside.
My selections is strictly that of Hindi cinema.

BEST
01. Dum Maaro Dum
02. Dhobi Ghat/That Girl In Yellow Boots (Tie)
03. Shor In The City
04. Yeh Saali Zindagi
05. 7 Khoon Maaf

06. Zindagi Na Milegi Dobara
07. Delhi Belly
08. Saheb Biwi Aur Gangster
09. Arakshan
10. Shagird

Haven't yet seen some of the other major releases of 2011--Rockstar, Don 2, Mausam, & The Dirty Picture. Additionally, I've taken the liberity in dividing my choices into (1-5) and (6-10), as I feel that the first five(or six) films on my list better represent the best of 2011. The other remaining films were nice fluff, but didn't find myself too strongly supporting them.

WORST
01. Shaitan
02. Ra.One
03. Yamla Pagla Deewana
04. Bodygaurd
05. Ready
06. Bhindi Baazaar Inc.
07. Emotional Atyachar

Amongst many films I'm sure that released in 2011 that are contendable for this list, but these seven were the results of excruciating pain suffered by yours truely upon its viewing. Films that are outright offensive to simply a waste of one's valuable time.

OK, here's mine - but i've not seen that many and still have a lot of 2011 films yet to see.

BEST
1. Not a Love Story
2. Shor in the City
3. Saheb Biwi Aur Gangster
4. That Girl In Yellow Boots
5. Shagird

WORST
1. Zindagi Na Milegi Dobara
2. Shaitan
3. Game