menstrual disorders
"I'm a lesbian, so I don't take this to prevent pregnancy, but because my periods were lasting two weeks before.  
Pros: my periods are regular and lighter, and my skin is completely clear.  
Cons: I originally gained around 15 pounds (which I have since lost), and I have no sex drive whatsoever.  

My breast size also increased from a D to a G, which I guess could be seen as a positive or negative.  I personally find it frustrating.  I am also very emotional, but I think that's just part of my personality and unrelated to the birth control."