Star Trek is many things to many people, but I do agree. It was born of television, and I've always felt that it was at it's best on
television. Oh sure, it lost its way somewhere near the end of the Berman run. But that was a clear case of burn-out behind the scenes, it wasn't an indication that Trek was poorly suited to the medium.
It does concern me too that Trek is often judged more in the casual sphere by its movies than by the (often superior IMO) television output. Evidently it reached a larger market and greater success in the cinema, but compromises were made to both TOS and
TNG in order to translate them for the masses. Television Star Trek is more pure.