The Yen and Yang of the Hero and His Opponent

When you are planning your novel, you need to make sure the protagonist and the antagonist are made for each other like a romantic couple.  A sort of yen and yang of power and abilities.  

For every power, strength, ability, or skill the hero/heroine has, the bad guy or guys should have one that tops him/her enough that he/she can barely survive each attack.  The hero/heroine should win more on guts and a need to protect his/her romantic partner or innocents than those abilities. 

The hero/heroine's fight must also be as much about fighting against an emotional weakness/fear as it is about fighting the bad guy.