I use colors and tags to segregate players, with specific notes .
Yellows - I want to play them a lot
Green - I want to play them but nothing crazy
Red - stay away unless you have Premium hand, or can afford gamble
Purple - stay away unless premium or nuts -
Orange - GTO Exploits,
Example:
Fish/Newbie - Yellow - be careful
bluffing, they will call
Regular/Loosing - Yellow
LPass - Loose/passive - will cal preflop a lot, usually never C-bet, and high C-Bet folds
LAG - Orange - make right decision preflop, and decide post-flop if willing to chase all streets, or get out
Similar/Break even - Green - similar skills.
Maniacs - Red - will call and bluff a lot, goin AI on the river - but even blind squirrel finds a nut sometimes - play them if you can afford it
TAG - Red - play them with premium - careful postop
Sharks - Purple - once in the hand, they will play to win - careful bluffing
Pro - Plays all types of games format and wins A LOT
Grinder - Orange - usually pays multicables, and don't have time to analyze each hand - will play GTO which might be exploitable with proper post-flops betting.
Of course these are just MY tags, and I change them one in a while. I also use sharks cope to see where the players stand (free version).