Everybody develops a particular improvisational style.
Some people are wordsmiths, focusing on linguistic excellence.
Other people are physical, relying on their facial expressions and large sweeping movements.
Still others are emotional, relying on big changes in emotion to get the job done.
Whatever your style, it's a good thing you're unique. And, your personality adds to the team; however, sometimes things can get into a rut.
Wordsmiths can become talking heads.
Physical players can become clowns.
Emotional players can become gimmicks.
It's important to work off your strengths, but to keep pushing them. If you're physical, keep it up. But, start adding other dimensions. Nothing is better than a physical player who can employ emotions and interesting words to their performance (think Chris Farley in the motivational speaker).