Many of these things lead directly to our making or saving money. If, like TJ, you notice a bazillion little things like this, and are able to remember all that stuff, the cumulative amount of money earned from knowing player's histories is going to be quite a lot. Unfortunately it was too much of a pain in the butt to do that because it's all in my head. A good memory is invaluable in poker, but I'm talking about more than just mere memory. I'm talking about history.
Poker is a complex mass of pot situations and player tendencies.
If the job were to just remember one person, it would be easy. The more history you have to learn, the tougher the job. But the more history you do learn, the more money in your pocket.