what if I were wrong, and you had never mentioned it

Meme time again! (I really do apologise to people on my flist who have no interest in either fanfiction or White Collar.) I think veleda_k was the first person I saw posting this...

Pick a character I've written and I will give and explain the top five ideas/concepts/etc I keep in mind while writing that character that I believe are essential to accurately depicting them.