I vastly prefer the picture quality of my TV at home to the Cinema. Mainly because of two things, frame rate and black level.
I do like movies that is presented with higher framerates in the cinema like Avatar and the Hobbit movies. But most movies stutter to me at the cinema making it annoying to watch.
Black levels are a joke on most traditional movie screens making the picture a washed out grey instead of crisp.
The cinema is still great for the sound and it is another experience watching with a lot of people, getting with the wibe of laughter, gasps and the like. Still generally prefer my home experience since other people are a two edged sword, not everyone have respect for their fellow man.