Battlestar Galactica FTW. Then the original 1976 Star Wars Movie.... The only Star Trek thing that didn't leave me dissapointed was the latest re-invention of the Movie, and parts of Wrath of Khan...
Isn't that redundant?? Just joking.
Star Wars and Star Trek (and BSG, for what it's worth) always served different purposes to me.
Star Wars is a great story of magic and excitement with a strong, moralistic undercurrent. The Luke-Vader story line helped to teach me right from wrong (basic morals) as well as humility, since Luke could have / would have BEEN Vader if not for Vader's own example, so don't be holier-than-thou.
Star Trek TNG (my favorite) and the Original Series were all about puzzles of wonderment and vexing, complicated ethical questions. Where Star Wars was about impossible magic and black vs. white morals, Star Trek was about imagining the fantastic through the scientifically semi-plausible, and about making the right decision when things are in shades of grey (ethics).
The original cast Star Trek movies were of a different sort. They were about getting older and dealing with one's own feeling and prejudices. Mostly they were about being self-aware and maintaining an openness to grow and change.
Finally, the new Battlestar Galactica was a decade later, so less influential in my life, but man nothing had more bang for the buck than that story. It had a gritty realism and maintained a pained nuance that most shows would never try. I haven't re-watched it in a while so I'm not sure how it's aged now that 9/11 and the Iraq war are another decade removed, but it was powerful stuff at the time about how to make the best decision in impossible situations. Best show on TV before Breaking Bad.