Since We're starting on places how they were in the movie, we shouldn't exclude bag end.
In the movie bag end looked nice but certainly not like the description as given in the hobbit
I always pictured as a large tunnel with adjoining rooms not one room with no tunnels
and i thought it was huge like taking allmost all the space of the hill and had several doors opening to the outside world
This is a very good point. The Hallway looked right, but that was as far as it went. I never pictured it to be quite so airy and light. More of a smoky hobbit hole used to being lived in to the extreme. You know there were two single blokes living there after all (and not an empty lager can in sight!)