I am Mennonite Brethren, although I was not born into it. I am English and most of the Mennonites where I live (heavily populated with MB) are Dutch/German. The MB are passive, peaceful, and Evangelical (Google the Evangelical Manifesto), and many are still agrarian, in a contemporary way.
If you read the Evangelical Manifesto, you will understand MB (one sect of Mennonites) beliefs. You will also find a lot of information here
Canadian Conference of Mennonite Brethren Churches - About Us
On the left side you will see mission, vision and values as well as a link to the confession of faith under "we believe".
How we live in our community is very family oriented, and we are committed to living clean lives, at peace with our neighbours and in a close-knit community. Although we are relatively conservative in our beliefs, we are liberal about how we live them out - meaning we do not push faith on anyone, although we are mission minded. This means we bring people more to the Lord Jesus by living what we say we believe than by preaching hellfire and damnation. We have a firm but compassionate response to sin in the church.
Actually, I think this link will help you better understand how we live than what I can say:
Canadian Conference of Mennonite Brethren Churches - Faith & Life Pamphlet Series
I hope that helps.
I have to say, after years of trying numerous other denominations and non-denom churches, I have found the MB to be the best fit. I have been MB for ten years.