Explorer through and through. My tour routes look like squiggles, figure eights, and hub-and-spokes if the wheel was run over by a few cars. Even on my local day rides, I try to go somewhere new every time, and I never take the same roads outbound and inbound if I can avoid it.
There are some exceptions for long bike trails. I've done the willard munger trail some four times, and would enjoy it again.