Because of the obscure nature of the source material of my muses, I can bend their stories a little for ease of crossover. Nothing stands in the way of a good plot.
I used to write my muses canon information and then my survival AU afterwards. I no longer do this, I write their history as I play them in my about. No major divergences other than survival AU are detailed on my character pages!
In general, I'm tired of the over-formatting in tumblr RP. I will probably not follow you back if I can't read read your blog easily. All I do is small text and cursive or bold if I feel a word needs emphasis. That being said, as long as it is readable, you're welcome to format as you like.
I don't really use icons, but you're welcome to use anything that you feel aids your reply. I am in the process of searching for faceclaims for my characters, as I never had any before. You are welcome to leave any suggestions you would like. That being said, when I do use faceclaims they are often just for illustrative purposes. None of my characters have graphics.