I'd agree with Ray. Since they confiscated signed photographs at a recent convention, I can't see them allowing you to make a film.
As for what I like, I've contibuted to those threads mentioned. 'Dark and grittier' -- DS9 was meant to be dark and grittier. I liked it, but the vast majority of fans didn't.
I think my biggest gripe of all about Star Trek is how they always kill off the best Villains: Khan, Lursa and B'Etor, Seska, Lore