i went to play 1/3 at the casino yesterday and i got seated at a table with one monster stack (around 2k). a seat opened up on his left as i was waiting for the big blind and i gleefully took it. after a while, i noticed that he was raising a lot of pots preflop (nothing ridiculous, just normal live game type raises, with a very wide range of hands) but he was fairly passive postflop unless he had a hand.