It’s a mistake to categorize most poker players as loose or tight and respond accordingly without taking into consideration their present frame of mind. There are very few players who consistently play one rigid way.
The exceptions might be the true “rocks” who never waver, only playing their very best hands, and those rare super-loose foes who consistently show no discipline about hand selection. Aside from that, most opponents change their strategy frequently. Sometimes this is calculated and sometimes it is governed by emotions.
I’ve known players who keep notebooks about the way frequent opponents play. And, of course, some players use tracking software to record trends regarding their online opponents decision making. Fine.
Having a history of opponents’ play can help. But it isn’t always accurate. That’s because the poker players are often out of step with their past. Mood changes. Determination changes. Focus changes. And opponents can be playing much better or much worse at the moment then they typically have in the past.
The important thing is to adjust your strategy to the way an opponent is playing right now. That’s usually more profitable than adapting to the way an opponent plays on average. — MC