In my opinon, there is nothing clunkier looking than the modern threadless stems that "expensive" bikes come with, and nothing sleeker than the old school 22.2mm solid stems.
I have two adjustables on two different bikes. They were installed so I could define my setup, as a temporary measure. Eventually, I'll replace them with Nitto Technomic stems. I haven't noticed any handling issues. They are definitely not as ugly as typical threadless units because they are well sculpted. But, beauty is in the eye of the beholder...
Don't tell me; you're a UNIX user, right?
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Today, I believe my jurisdiction ends here...