Personally, I have never seen most of the "great movies" that I "have" to see (e.g. The Godfather). I find movies in general to be exceedingly long and boring.
I am amazed at how often I find myself agreeing with you, But I dont like movies because i find them to be too short and laciking in capacity to tell a good story, most films seem to me like adverts for stories that ccould have been good if done through a decent medium (only short stories really translate at full potential to film imo)
and great thread title too, I REALLY wish i'd never seen star wars...
Well I usually find movies too long because they're not as interactive or interesting, but certain films can hold my interest. But yeah, I agree with you that they also don't often do enough to develop their own worlds. A lot of movies (like Avatar) present such a grand universe and show only a small portion of it.