One of my greatest struggles in writing is my bent toward Passive Voice. My husband says it's because I'm a passive person ;D Maybe that's it. Maybe it's because we're Christians, or just naturally polite, we'd rather say "I am loved by God." rather than "God loves me." OR "I was hoping that..." rather than "I hope that...." Just two quickie examples. I'm sure you can come up with many more.
Here 2 posts from Grammar Girl to help us identify and overcome the Passive monster within.