I usually pick the friends, and others have told me their opinion of why I don't get as many requests as I send, but I'm sure there is more than one reason. When it's clear I am clicking in some essential way with others on here, getting friend requests is nice: I've received three or four; it would be gratifying to keep receiving them as I plan to keep sending the requests.
Same as you @sprinkle I like to have a variety of friends from various places who hold different points of view--as long as they don't include extreme anti-male feminists, religious fanatics and such. So far, so good on that score.
Do you form mental pictures of members from here based on their avatars, writing style, or some other criterion?