Cave 3 is my favorite for the Cabbage and Gold :P I live off the Cabbage. Other than that I usually run around with a horse and gather mushrooms. The Greens, Yellow and Red have all the benefits I need when I need it.
@CursedBear My character level is only 25. You can find me as 'Brent' online. My games profile name is BrentJansma I don't know how you can add me or whatever, because I usually play single player solo. It's Dutch BTW :P