Thanks Jean, glad you enjoyed it.
Answers A.) I would say habit , since there are no harmful side effects that I have identified.
B.) Both. Steemit for meaningful things and informational posts, Sola for pictures and "tweets" or memes.
They are two different animals, steemit and sola, there are quite a few steemians doing both so you find people you know for sure, Sola actually has more registered accounts then steemit, by a couple hundred thousand accounts last i saw.
Go try it and look me up, there is a link up at the bottom of my post. See you there.