Star Wars, the original 3 where the best, TESB had the darkest story, TROTJ was too 'namby-pampy' and the story of intergalactic twins kinda killed it. Episode IV 'A new hope', the original Star Wars is the best, although an honourable mention goes to 'Revenge of the Sith' as it was actually quite good.
ok ..
Star Trek:
Star Trek the Movie - Best Story out of all the movies, the remastered one is very good. excellent.
Star Trek - The Wrath of Khan - Again excellent, when Spock died i was in shock.
Star Trek - The Search for Spock - Not bad, but when i seen Commander Kruge, all i could see was Jim from taxi
Star Trek - The Voyage Home. Very good, a bit out there, but very good.
Star Trek - The Final Frontier ......
Star Trek - The Undicovered Country. Excellent, the best of the lot, i was hanging of the edge of my seat when the Excellsior was flying to help.
Star Trek - Generations ......
Star Trek - First Contact , very good, but missing something, dont know what.
Star Trek - Insurrection ....
Star Trek - Nemesis. Complete Tosh. the only clone i have ever seen that looked nothing like its host.
so ...
Star Wars , and Star Trek VI - The Undiscovered Country.