My favorite typo is where people write “defiantly” when they mean “definitely” because it still generally works with whatever they’re writing about but it adds this whole layer of “IN YO’ FACE!” aggression.
“Hey, are you going to the party?”
“Yes, I’ll defiantly be there!”
*throws down present, shoves whole cake in mouth, swings wildly at the piñata, stares down anyone who dares question their right to take all the candy, refuses to take off shoes in the bouncy castle*
The Obsessive Dilettante 