It's great to hear that you're delving into the intricacies of master games and exploring the nuances of their moves. The observation about seemingly hanging pieces that are tactically justified is indeed fascinating. It reflects the depth of positional understanding and the ability to calculate accurately. Analyzing lines after a GM vs. GM resignation can provide valuable insights, especially when seeking the Hide View Status updating core resource files, utilizing the message scheduler rationale behind specific moves. If you're interested, I'd recommend exploring annotated games or commentary by experts to gain further context on those precise and tactical moves. It's a fantastic way to enhance your tactical awareness and strategic understanding. Keep up the insightful analysis, and feel free to share more interesting positions or insights from your studies!
Higher level moves
@1
"recommendations for an easier to digest, or annotated, collection of precise moves."
Here is a famous one: 30 Ba3
https://www.chessgames.com/perl/chessgame?gid=1031957
"Tactics puzzles seem to be very hit or miss with quality" ++ Yes.
"studies are either too complicated or seem to lack practical value." ++ Look at Troitzky studies. Those are practical.

After 30.Ba3, I saw 31.Nh5+ almost instantly. Finding 30.Ba3 is a different story though. It's a very good move. It highlights the weaknesses in black's position perfectly.
Ba3 was probably found by combining ideas to activate the miserable bishop and making the Nh5+ work after Qe7.
The main point has to be activating the bishop though as the capture isn't forced.
Thanks for posting. That is a perfect example of what I am looking for. Moves like this come from positions that are rich in nuances and display how to capitalize on not immediately obvious inaccuracies. I always learn a lot by looking at these positions.
@4
Here is another example: 22...Rh8
https://www.chessgames.com/perl/chessgame?gid=1042835
However, bear in mind that such moves are exceptional, not the rule.

The premise seems simple: Deflect whites queen to a passive square and use my active pieces to mate white.
This is a very good example of just how important activity is, but not technically best due to an improvement on white's play... 24.d5! An amazing resource... Disrupting the coordination of whites pieces and allowing white to untangle their pieces and give back material if necessary. This is the only move that saves white from the looks of it.
Black's moves are somewhat simplified by this move though and gives great practical chances and doesn't lose the game.
Amazing position!

Black wins the bishop because of the mistake 22.Qg5? moving the queen to a square that creates royal fork threats via Nf3.
Great tactic.
Maintaining the material advantage isn't an easy task though as the rook and queen are both under fire. 23...Qg3! is an amazing resource that does just that!
Pattern recognition came into play here.
I am finding a lot of interesting concepts from reviewing master games (analyzing what i would have played and finding out why it does(n't) work, seeing how the engine would have handled the position differently than the master, etc..) but one commonality I'm noticing when I fail to guess the next move are moves that appear to leave a piece hanging but are tactically justified. These tend to be very precise move.
An example is this interesting (to me at least) position from analyzing lines after GM vs GM resignation (I tend to want to know the follow up since it isn't often clear to me):
Kg3 is a multi-purpose move that is very precise.
Please let me know your recommendations for an easier to digest, or annotated, collection of precise moves.
Tactics puzzles seem to be very hit or miss with quality in my opinion, and studies are either too complicated or seem to lack practical value.
Thanks in advance!