recents panel: you can hide the recent activity panel, which shows a random post from the last few days, by unchecking "show recent activity panel" in your settings
twitter user names: if you authorize with twitter, avalantern will convert avalantern user names with @twitter user names! you don't even need to worry about it!
a wise man once told me not to trust anyone with well manicured facial hair. i am twenty-four, and this has proved to be very among the wiser things anyone has ever told me.
friends: if you tend to post somewhat personal stuff, you can set the post to be visible only to your friends. you can mark each user as a friend when viewing their profile. removing a friend will remove their ability to see your friends-only posts
timezone: move around a lot? avalantern can detect your timezone for you, but if you'd prefer, you can set it in your settings