Why you guys aren't crushing these Microlimit games...

[Ed Miller]

Also what exactly constitutes a "big" pot?

There is no cutoff. Whenever you see advice that says, "Do this in a big pot," it really means, "As the pot gets bigger, be more inclined to do this." That is to say, there are usually several factors to consider when making a poker decision. One of those is pot size... which is a continuum. Depending on how the other factors line up, the fulcrum (to use Backdoor's word) pot size can change.

With that disclaimer, in many situations you can begin to think of the pot as "big" once it is raised preflop.