when you are playing a thief you notice 2 kind of creatures: the droppers (peekable) and the traders (unpeekable).
About those traders. When you try to peek them you see this:
"You shouldn't do that, someone will think you are a thief"
For a thief this is quite annoying, cause like i care if they think i'm a thief, cause i AM one.
I suggest all creatures should be peekable. Knowing creatures are traders/droppers is valuable information, especially in new area's with new creatures.
Ps. Don't know if it's possible, but why aren't there creatures who can drop and can trade?
PPs. Can you give the line which says if you have mail a colour, like green when you have no mail and red if you have new mail... perhaps blue for undeleted mail.