And yet, Trek has never inspired the same amount of emotional reaction from me as:
Or
And that's not even the best movie.
It's not a matter of kiddie vs adult, or complexity. Over the course of fifty years, you could count amount of times Trek explored true moral greyness (as in there's no 'right') on your fingers. And no, the writers accidentally botching their own message doesn't count.
Trek has just never been able to grab people by the heart in the way Star Wars does. People don't latch onto the characters, and the world doesn't capture their imagination. Trying to claim that's because Trek goes for the 'intellect' will only take you so far.
*
looks at episode list*
And that 'far' is when Kirk killed the oh-so-supposably tragic (but really always douchey) God-Mitchell, by dropping a rock on his head.