The Big Bang Theory: Is there too much Sheldon?

It took some time for me to become a big fan of The Big Bang Theory and now I hear the CBS sitcom is being renewed for three seasons.  I think the show started out a little lame; a nerd, Leonard, in love with the hot girl, Penny, across the hall.  I started liking it better as they moved away from this concept and made Penny more interesting and interacting with all the characters.  Now days, She and Sheldon have tension in their relationship which is based on a little hate and a little respect.  This often leads to some very funny moments, but sometimes I think the focus is turned toward Sheldon too much.  Although I love his character, He should not be the main course!  All five of the main characters can hold their own so the producers should spread the focus on all of their stories.  Do you think this seasons episodes of The Big Bang Theory gives us too much Sheldon?

Carl Robinson