What the heck do these terms mean?

Ignore all,this nonsense!
its 10$ words to sound sophisticated, dribble

if you like the sound of your stereo, it’s great!

 These reviewers, are full of BS, AND paid by the companies to make their products sound good w fancy words.

 Air around instruments,  live in my room, celestial sound, do t be a fool bro!

 If you think it sounds great, that’s what matters, don’t believe these dipshi*es!

 Enjoy. The music!

"...what makes a Strad a Stratocaster??? "

Pickups and the player....although the traditionalists would have someone drawn and quartered, slowly...:)

Considering the 'range' of music and it's diversity of 'characteristics' (Is that a fair term to apply?) and variety..

Shouldn't equipment, and especially speakers, be able to render nearly anything that the artist and the engineer wrought?

'Fat basslines'....'crisp' drumlines with 'impact'....solo violin, played against a 'velvet' silence....all with 'clarity'.

'Fuzztones' by an guitar intro....echos that remain sharp into silence, or within a mix...

You are what you hear....and how....and where....

Enjoy it, J

Organic, to me is a great discriptive term in audio. Like when everything is performing as it should, with no hint of over-exaggeration in any part of the frequency range. The music just flows naturally.

Musical is a term I use to describe lower bass registers. They can be sluggish, muddy, slow, too crisp/tight....... To me, the opposite of these terms is musical.

The solution of to how to best describe sound in writing is simple.
Don't try.

The only way it should be done is via A/B employing your ears.

In other words, do the reviews on Youtube with audio
actually demonstrating the point a reviewer is trying to make.
Now you say the audio quality sucks on a laptop. 
You could still discern differences between wet and dry,
fat and skinny, Polite and forward. 

Using the written form to describe audible differences is 
not going to work. People will simply read the material and
then make an interpretation that seems correct.
Highly inaccurate methodology it seems to me.
 
Admittedly this might abbreviate most written reviews by 80%
but hey it is our time they are wasting.

Ozzy welcome to the world of audiophiles.
Thank you for showing us the Emperors New Clothes! 

Let's hope this economic shakedown brings a sobering reality
long needed back to audio.