If you click the settings wheel in the studio and open the "Audio" section, you will see the option to turn off "Echo cancellation". That will remove all audio processing (echo cancellation, noise suppression, etc), and make you sound better.
If you use a stereo mic, also enable "Stereo audio".
If you have guests, make sure you are wearing headphones. If you have a guest with headphones, they can turn off echo cancellation for themselves as well.