I pretty much just use FB to keep my family updated on what I am doing (I live far away from my parents) and Twitter to stay up to date with what my friends are doing. G+ is just for video chatting for me :)
I'm on G+ but haven't even realized they added a poll! I agree about Vingle! Everyone is so friendly here, one of the reasons why I like it myself. I'm on so many social networks too, I sometimes forget to sit down and really compare them.