At 5NL on my laptop I play 7-8 tables at a time. They are small and cluttered all over the place. I get my reads by noticing who is multi-table-ing like me and those who are, I assume they are tight ABC, otherwise everyone else is a donk that plays crap hands.
I've heard of people playing 12 tables at micro stakes, is this with the use of two monitors?
How many tables do you play and how do you arrange them? How do you get your reads on 8+ tables?