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.
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.

Not wanting to argue about the Naim speaker plugss but I have seen arrangements like this and they are correct and do not cross if the unit is placed beteeen the speakers.  The left side on the back corresponds to the right side looking at  the front of the unit and the speakers.   This is how I read your description anyway.
In loudspeakers, it is those which provide a "looking down on the soundstage" perspective, and/or which put a vocalists mouth at waist height. I like to look up at the stage, and I want a vocalists mouth at least 5' off the floor. Point source loudspeakers often produce the former, line sources the latter. 
I don't particularly like the way my amplifier and CD remotes rattle if you shake them. The buttons are steel bearings and the casings are also steel. Only four bearings on the amp unit (power, vol up, vol down, mute) but there's 24 bearings on the CD unit and it can make some noise if you shake it.