I never thought my opinion of a "henchmen" could be lower until I saw these Venture Bros. Henchmen of The Monarch.
Of course the Star Wars Stormtroopers are the most popular henchmen. The Wicked Witch of the West's' flying monkeys if you include primates. Those henchmen get to wear cool armor and fashionable vests.
But what do characters like Henchmen 21 and 24 get; butterfly costumes. I guess that's why only depressed people wear them.
Oh well, at least they make some people happy (see above).