Monks can't get no armor, and every Outfit I've ever gotten has been a "bathrobe"! and wizards are bull, playing with the laws of physics, I GOT THIS FAR BY USING THE LAWS OF PHYSICS TO MY ADVANTAGE! And for the record, he does have an outfit on underneath, he's not walking around with a damn robe, his drawers and shoes. and face it dude, Our heroes are immortals now, and he's kicking his third milleneum, you don't think, with how vain lufor is, he wouldn't wear make up or use hair dye to hide the slightest effects of aging? do you think he'd actually THINK to get an illusion to do that for him?
As for Harry dresden, he's the wizard protagonist of a book series I'm reading, takes your idea of a "bathrobe" wizard to a higher level.
Couldn't wear his good robe to a wizard council meeting because his cat took a dump on it, so he walked in with what I think was a flannel bathrobe. it's was still TECHNICALLY a robe.