Im sure we have had a thread on this before, but i cant find it and ive seen a few posts in other forums about so here goes.
What do other people use as notes for other players?
Mine go like this.
Is he positional?
Does he play correct starting hands (also in a raised pot)
Generally LAGG or TAGG
C-bets?
chaser? (passive or semi bluffer)
knows where the fold button is? (eg i call his prflop raise with 89, he misses then c-bets and i pump in a big reraise, can he fold here?)
Likely to tilt if i outplay him?
bets scare cards?
preflop trapper?
Any other unusual traits ive seen, eg cold calling from the bb with AA and trapping opp for a stack

These are points that are important considerations to me when i play against opps simply because of the way i style my game.
What do otehrs use, but more importantly why?