One of the things we really try to prevent are people joining for "mercenary" reason - like getting business contacts and the like. I was a smelly government worker, so it didn't matter to me. As a member of the military, I moved every few years, and I've always been slow to develop new friendships - and I figured that being a member of an international fraternity, I'd have something in common and making friends would be easier. I'll say that it has been VERY enjoyable.
My only word of "warning" is that in many Lodges, there will be pressure to be involved in the hierarchy - and it is VERY time consuming. In the ritual of the First Degree, you are Charged to NOT get so deep into the Lodge that it interferes with your business, family or general life. We don't want you to get burnt out and end up quitting.