I use the note color to describe basic tendencies ie station/trappy/bad at vbetting/fish/lagtard.

Then I'll note where anything out of the ordinary happened - I never really have time to read them but after a couple I'll consolidate them into general reads and how I think they perceive me. So my notes may start out as something like "flat xx btn/co 100bb,calldown triple barrell on xxxxx vs air" and end up as something like "prolly thinks Im aggromonkey,bluffcatches - vb to death dnb" etc.