In John Riley's DVD, he talks about "headroom". Basically, you should be able to play more complicated stuff and faster than what is actually required of you at a gig. If you need to play a song at 200bpm, and 200bpm is the fastest you can possibly play, you're going to wear yourself out and not play as smoothly/comfortably as you can. If you could play at 250bpm, on the other hand, 200 bpm would probably be a walk in the park, and you could focus more on groove and creativity and less on trying to constantly keep up.
I think the same applies in your situation. Just because you don't play a bunch of amazing grooves or licks that you've been shedding in the practice room at your gigs doesn't mean that they don't matter. On the contrary, they are what make you more comfortable playing the easier stuff with a much better feel. And, if you DO get to whip them out once in a while, then great!
The problem arises when drummers actually start bringing their "practice room chops" into a live performance situation when it's not the best thing for the song...then, it's just over-playing and it sounds bad. If you want more audience members to like you, and more professional bands/musicians to take notice of you, then focus on playing what's appropriate for the song, and get over any sense of "Sheesh! I wish I could show off a bit while I'm up here." or "I want people to see what I can REALLY do!" Those feelings will either cause you to overplay or start feeling resentful of the music/musicians, and those are both roads you want to avoid going down.