What is the most aggravating thing about poker?

Blackhawk, you said you don't like how everybody thinks they are a shark. I think many will agree with me that these players (who think they're sharks, but aren't) are where the most money comes from. They always keep coming back, because they convince themselves they are always better, but unlucky. However, I must agree, that I HATE those players that talk at a table about pot odds and position plays that they made, using poker terminology to make others think they are good. These ppl are just annoying.