The Next Generation
Deep Space Nine
Original
Voyager
Enterprise
In that order.
Yeah that's right, I spelled them all the way out.
I never really thought the movies were on the level of the shows. They're ok, but Star Trek has always been its best on TV. The movies always go for cheap laughs and action sequences too much. The beauty of the TV shows has always been that they make you feel like they're real people, just in a future space traveling society.