Today I worked on extending and simplifying the rhythm of the main theme. It's not enough that it sounds good in MIDI playback. If you are writing for live musicians and you want your music to sound the way it should, make it as legible as possible. Make this a priority. If it looks complicated, this doesn't necessarily mean you've written highly advanced music, it might just mean that you've notated it badly. Always make sure the rhythmic pulse (eg. 3/4 time) you want is clear in the notation. Your performers will appreciate you more if you do this.