Join Date: Oct 2006
Posts: 22,537
You should stay in your seat, sitting close to the table, with the chair facing forwards. You're folding most of your hands anyway, so get up and stretch during the long blocks of time you're not involved in a pot.
A reason for this is that allowing players to move around the table makes it too easy for them to get a peek at the cards of others. Yes, players should be more careful, but they're not, and they have an expectation of a reasonable amount of privacy in their personal "zones". Leaning back or sitting too low is also a violation of this. Even if you insist you can't see anything and that you deliberately look away, that doesn't matter. We're after the appearance of impropriety, after all.
Another reason is that it slows down the game. People who do this insist that it doesn't. Those people are mistaken.