On reverb
I always thought two- and three-knob reverb would be too fussy (too much to tweak) until I actually tried the three-knob reverb on the Vibro-King. (That reverb unit is almost literally Fender's 3-knob 'verb tacked onto the front of the amp.) It's nice to have some control over both the depth (think of it as the amount of splash) and the tone (makes it seem like you're going from a well-padded room to a room with concrete walls). After learning about that, I realized that all the one-knob 'verbs are a compromise: they put two of the important parameters where you can't reach them without a soldering iron.
When I built my big pedalboard (since retired) I included a couple of Alesis Nanoverbs - one for time effects (chorus, flange or echo) and the other for reverb. Those 'verbs are very lush - almost too much for guitar, IMO. I guess my ear is just tuned to the old-school sounds...