Ive been sitting beside fish since 3-6 and the only difference between those fish and the 15-30 fish is that there are less of them at 15-30, but still enough to make tons of $$$ if I look hard enough.

I actually refuse to play at bad tables. If there are no good 15-30 but theres good 20-40 and good 10-20 , ill play at those instead.

That being said, ill have 4 tables im playing, 6 tables open im pseudo-mining, and ill be on a tons of waitlists, so whenever a spot opens up, I can check out that new table, see if its better than any of my curent tables, and if it is, I drop my worst table and pick up that better one. I also like checking out the semi-filled full tables since those generally attract loose fish, and if somehow those fill up, I end up in a full game with those very loose fish = very very good table.