Depending on what you are playing, playing to wet will make your sound mushy.I play on a blackface fender which is known as one of the reverbs out there. I have it on 2 its just a little ambiance. I use 2 delays one gives a short slapback with about 2 repeats with the level down quite a bit. My other delay is set with a much longer delay which gives a much slower decay, think Dave gilmour.
The difference between reverb and echo is this, echo repeats your signal like yelling into a cave, reverb on its own adds very short timed repeats which is kind of like changing the hardness of the cave walls. Softer has less ambiance harder adds more.
Small doses is great and adds to your overall tone, to much males it mushy and undistinguished.