I don't know about anybody else, but I really struggle to notice some of the messages that come through...
Because my field of vision is mainly on the sprite, I often miss important status updates telling me things like my bag is full, or that an action is not possible or whatever.
This leads to confusion - sometimes I have left a location thinking I've bought something from a vendor, but it's only later that I realise I haven't.
What would be great is if the sprite itself gave some visual indication that the action had failed (like a red exclamation mark or a puzzled face etc). Even the pet rock getting a bit angsty would be useful.