I now find myself wanting to make a character who, every time he's confronted with a monster, announces confidently "I know what this is!" and then proceeds to name the wrong monster, and describe in detail the combat abilities of some other wrong monster.
I have a player in my campaign who plays a character that thinks any monster-related clue they find signals the presence of an owlbear.
(It's a shame they'll likely encounter an owlbear next session and he won't be there.)