I think at my home is the best!!

Wherever I can immerse myself in the movie....

If it's a big blockbuster like Interstellar or Avatar, which is best served on a big screen with 3D and 1337.1 () Dolby surround, where I know that on most occasions I won't be interrupted during the movie, I'll go the the cinema.

Usually, I'll watch movies and shows on my PC with headphones. Why not on TV with the rest of the family?
.... for the same reasons, I think it is less immersive due to the fact that the TV does not fill most of your field of view and some of the audio is lost.
But also, because I can't stand it when people snaps the immersion by getting up to make a coffee or feed the dog.

If you're watching a movie, either sit your ass down and enjoy the movie or don't disturb those watching it!

At Home

Love to watch it on my PC. Huge monitor + surround sound and i can smoke! Ill only go to the movies to watch it in 3D

PLEX home theater - good speakers setup with sub on top...
I find home sound better than the cinema for many movies and need to save money...

At home, in my dedicated room for movies.

Home,on PC

Because of laziness mostly at home in front of my comp or tv.

Mostly at home on my PC

In cinema mostly...Not so often but I would anytime prefer cinema to home.