hello ceing,
listening to other drummers' fill in and copy/modify is one thing. If you are writing a song with your band, it will be best if u step out as a drummer, listen carefully what you band mates are playing, then step in as a drummer to do necessary fill ins which gel with your mates. It might be unison in a certain phrase during your fill in, going along with the accent of the song, contrasting with other instruments, messing around with time or the "question and answer" sort of fill ins. All these will create a certain impact on the song itself.
Well, thats my opinion.