What Do Catholics Think About Birth Control?

Officially, they are against it.  Many Catholics still practice some form of birth control, often a naturally method like rhythm, because a household full of children is very difficult to raise in these days.  Still, some Orthodox Catholics do not practice.  I have Catholic friends from families with 5, 7, 9, siblings or more.  Some of the 20-30 something  ones practice some sort of birth control, and some don't and take what they are given.  
I' not Catholic, just know so many that are and the personal choices that best fit their lifestyle and financial abilities regardless of what the Vatican says.