Yes, a lot of the spin-offs have proven it can be very strong.

As far as anymore movies tied into the original "episodes"... I think they fucking ruined those.

I honestly was one of those pretty easily pleased, almost mouth breathers *Look at da pretty Lightsabers* type of Star Wars fan when the last trilogy came out... but the last 2 movies really ruined that whole saga for me... or rather ever wanting to hear more about it (continuing the story).