Let me start by saying that I probably visit too many social sites. I’ve cut back, but it’s still quite a bit. However, one thing that I do is always try to get the same name at each one (covati) and always use the same picture.
I know it’s fun and cute to use a new picture of your child, cat, boat, favorite martian, etc. But when it comes down to it, you are creating a personal brand, and that brand needs to be identifiable.
So I would recommend the same for you, if you have a presence in multiple locations, try to keep it the same. Even though they are different services you want your audience to be able to immediately identify you no matter where you are.