Interesting question.
I have eight categories which I use, for different reasons.
1.Friday Night Poker Club (GREEN) - This is so I can see when my friends are on the same table as me. As we often chat whilst we play, I want to make sure I know who is sitting where so I don't accidentally let my hole cards slip. My notes on my mates are minimal. I know how they play as I've been playing regularly with them for more than 5 years.
2. CardsChatClub (LIGHT BLUE)- I give them all a category the first time I play them. Once I have real notes on the person (see below), then I'll migrate them to another category.
3. General Poker (YELLOW) - Similar to above, but for every person I ever sit down with. Once I have some info, they'll migrate to a ne category.
4. SpinNGo (PURPLE)- Similar to the above two categories, but really this is just to visually flag to me whether I've played against them before. If I have, I refer to the HUD for details. Spins go too quickly to build up notes.
5. Fishy Fish Fish (DARK BLUE)- My notes for players migrated to this category will typically refer to their ranges from particular positions. I'll also indicate what sort of hands resulted in what sort of action. E.G Shoved K9o from UTG with 45BB
Also will make notes about limpers and slow plays.
Might have info about what size bet makes a person fold their BB.
Note about likelihood for the villain to defend their blinds.
6. NIT (BLUE)- Reserved for those with a VPIP 14 and under. Don't really need any more info on nits. Play the Anti-Nit strategy. (Raise unless aggression is encountered. Avoid pots where they raise pre-flop.
7. TAG - Tight Aggressive. (RED) These are very different from NITs. I do not avoid TAG players. I just use extreme caution. I'll look at the HUD stats to see what needs to be explicitly highlighted in the notes. For example, if they have a huge Cbet stat, I might be more likely to call to see later streets. But if CBet is low, a post-flop cbet will put me on alert.
8. Tricky (AMBER) - These will include wild personalities, big bettors, check raisers, 3 and four bettors, and people who will shove any pair or ace. I will often have notes whether attack or trap is more effective on the player, small Cbets or Large Cbets, etc.
So for me, its a combination of Visual Categorisation, HUD stats and hand specific notes, along with bet sizes, position, stack size an action.
I was surprised that when moving from HM3 this week to PT4 I had 110K hands played on stars. Much of that is with CC members...so if people above rubbish the idea of keeping notes, all the better for we who think notes are useful.
Cheers,
ObbleeXY