When you get to know a new from in Mylot, I wonder you remember the name or the avatar. As to me, I will remember the avatar at first. As sometimes the name is long and complicated and I can't remember it.
Generally, it is the avatar for me as well. When I see my notifications, the individual comes to mind as soon as I see the avatar. For some, I don't thing I even remember the name at all after the first time reading it :)