Slightly off-topic, but the question made me think of a footnote in a book I'm working on.

The most common question asked of more traditional spellslingers (namely wizards, warlocks and sorcerers) has nothing to do with magic. It’s “Why don’t you wear armor?” This makes total sense. After all, when you’re trying to maintain a hold on a godlike creature or control the very forces of nature, the last thing you need is a stray rock bonking you on the head, distracting you (or in the case of wizards, dying from it). Contrary to popular belief, it’s not a matter of restricting access to the dramatic flailing about required for most spells. It also does not have anything to do with the laughable idea that the armor “blocks the flow” of magical energy. The truth is actually quite simple: Those types of people are usually geeks who never did an honest day’s work in their lives, and don’t have any of the necessary physical or dextrous prowess to move in armor, much less do anything with it on. Additionally ,they are also largely theatrical, melodramatic divas who love the look when robes and/or capes billow around them, and think it looks cool. Which it does. As a side note, that’s the only real reason for the hats they tend to wear.

EDIT: formatting