I basically only use facebook. I use it far less than I used to, the novelty is definitely wearing off. I do find it a great way to organize a get together at everyone's convenience to reply. I tend to use it to follow local sports teams and to get an idea of whats happening news wise.
Not a fan of twitter. the only time I ever use it is to get extra contests entries and such.
These are exactly my thoughts as well. Grand majority of users on facebook are sheeps. Facebook is good from business point of view to manage trends and probe what people like. It always makes me laugh if someone tell me that he has xxxx amount of friends on facebook. Friendship is not about quantity it is about quality.
I always think if this when I see people with tonnes of friends: