Different shows breed different music.
With that said, I've been sorely disappointed with much of Trek music for being too bland and unemotional: compare the vibrant and urgent feel of the "Way of the Warrior" score to the ho-hum blah score of "Sacrifice of the Angels," for example.
I also feel that, while I love orchestral renditions and performances, Trek music was starting to become a parody of itself halfway into Enterprise. I'm well aware of the need for stock music, but it seemed like nearly every episode from mid-TNG to mid-Enterprise had the same arch, the same tone, very little variation, very little creativity.
All I ask is for something unique to Trek, using the same standard instruments but playing it up, which Enterprise started experimenting with before she died. Trek music is known for heavy string use, which should be expanded upon. Coincidentally, my current favorite TV song is nuBSG's "Prelude to War," which uses string instruments in decidedly un-Trekkian ways.