When do you leave the table?

When starting a session, I usualy try to find a table with 2 fish 40+ vpip and usualy leave when both of them leave, and only regs remain. Also, unless I`m tired, when I have a big stack and there are other big stacks at the table, I usualy stick around, because I have lot`s of confidence in my game playing deep stacked, regardless if the table is full of regs.

Sometimes I leave or try to change seats of a good Taglag or Lag is on my left.