What is the most overlooked consideration?

A mis-match of the preamp and the amp that can hinder the overall performance.

@2psyop 

My top criteria’s when choosing a gear; does it provide long-term musical connection. More importantly, does it invite me to play more music, not just “audiophile tracks”?  Secondly, synergy and lastly designer’s (manufacturer) integrity and accessibility; if and when I need the support of the person or team behind the product. 

I have gone through my fair share of components in my pursuit of putting together an audio system that connects you to music intimately. A good audio gear doesn’t just sound good, it changes your behavior; how you feel and appreciate the music. 

Reputation matters but resale, it’s a crap shoot :-) 

For myself, build quality / proven reliability is of the utmost importance. Then after requirement is met ( hopefully), sound quality that brings you closest to live music. 
 

I can’t be bothered by finicky, questionably made products & shipping back expensive & heavy stuff for repairs or modifications. That type of annoyance & frustration would take all of the enjoyment I get out of listen to good music. 
 

For example, I bought a really good turntable/ arm /cartridge over 20 years ago & it still works perfectly & sounds excellent. One new belt & one new cartridge ( mishap w/ a cat). I think in general, smaller American companies have the best chance of providing such consistent quality. 

@freediver

Musicality, technically comes about primarily from the properties of rhythm & pace and midrange bloom. Understanding the elements are not necessary. You can gauge the from auditioning products and systems, reading reviews and listening to live music. Learning this aspect of music...  is probably one of the most overlooked aspects since it is really a gestalt thing and most folks turn on their analytical skills and examine the minute details of the sound as opposed to the overall presentation. Hence, we brought it up as an often overlooked consideration. 

WAF.