If we discuss our preferences here too much, won't it influence the outcome ?

#4
 
The vocasl sound great with nice intelligibility.
 
 

As long as we're revealing choices (minor spoiler alert):
 
I liked 6 the best. 3 was a close second. 1 was too much in my face. 5 lost a bit of clarity. I'm guessing 2 and 4 are the LandR tracks, and I much preferred 4 over 2.
 
Ranking: 6, 3, 4, 5, 2, 1

Ahh, ok, if we're ok to reveal, here's my feedback:

#1 - Nothing special. Lacks life.
#2 - Too punchy/poppy in the low-end and little life in the rest of the spectrum. Dry and Veiled.
#3 - The best master of the collection; although there's a bit much compression/limiting in the kick/bass area. It has life. Musical. I would guess this was the Professionally Mastered version.
#4 - Veiled. Better balance than #2, but still lacking a real life.
#5 - Closest to #3; musical and warm without being veiled. However a bit too compressed in comparison to #3.
#6 - Again, nothing special. More like #1, although slightly brighter.

I came to take a blind test and it tests my hearing!?  
 
I pick #3

Good idea, and I don't want to sound awkward but 'sounds best' relative to what? Everyone has different musical tastes depending on a myriad of things.

Interesting idea, will have a listen to these tonight.
 
But the "results" so far already indicate there's no such thing as a perfect master - there have been votes for #2, #3, #4 & #6 as being the "best".
 
It's all down to personal taste at the end of the day.

It was a toss up between 3 and 5 for me, but I ultimately went with 5.

Wouldn't the *worst* be interesting too (for obvious reasons)?

Excellent idea!
 
Done.