which is better for wahs? in the effects loops or on the floor? I know it makes a difference if its on the floor before distortion pedals or after them.
There's not necessarily a "right" answer but most folks have their wahs as the first thing after the guitar in the signal chain. Most wahs are sensitive to input impedance and having a low impedance input signal (as you'll have post-distortion) often leads to a disappointing effect.