Stuck on subs

I've noticed that whenever I am facing a difficult opponent or in high stress the submission I resort to my fall back move is the armbar right arm, usually from guard or knee ride. Its instinctual almost a subconscious obsession that when I'm in trouble on bottom I resort to. A fail safe high percentage submission. I've won tournaments and beaten better people with it. I wonder is it just because my opponents are exposing their right arms to danger so much or the more likely answer I have drilled it so much from the same side that it is now almost perfect in setup. I am thinking about forcing myself to go for the other side armbar or triangle even. Maybe obtaining the next level is more about going that second step and becoming proficient and perfecting two three or four more techniques that compliment each other on a different level.