One of the things that's really different on Facebook, is that Facebook posts rarely are about Facebook itself. However, here on Steemit a very large portion of the posts is about Steemit itself.
On one hand this seems necessary for the platform isn't really self-explanatory yet. On the other hand it also seems very 'evangelical' to the normies.
Maybe we need more simple and fun content here on Steemit to make normies feel welcome, I think.