Top Ten "Reasons I Don't Like This Component"

Many of us have had the short term experience of demoing or acquiring a piece of gear that, when we installed it in our systems, we soon realized that it wasn’t going to work.

An example I recently cited was after home demoing a CJ 17LS preamp years ago. I couldn’t stand the banging sound of the volume relays while adjusting. The unit sounded fine enough musically but this particular feature was intolerable.

What other features or quirks of components have you had similar experiences with over the short term? I’m not talking about chronic upgraditis, which most of us are afllicted with, just short term experiences that make us say, "this does not work for me."

No need to list ten reasons, just one or two. I'll keep a tab on them and summarize later.
Not good enough, that's the only reason.
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I love Thiel but having binding posts on the bottom of the speaker with legacy models is a major hassle when connecting cables.
Never had this problem everything i get is always an upgrade have been lucky so far.
Unipivot tonearms, flopping around like a fish-out-of-water.