rhythm is a good thing when it comes to wah .......... also ... whenever it's closed, you don't have to open it all the way, it's the dynamics of the wah itself :) ..... just mess with it, experimentation is what made me a friend of the wah ........ mess with the rhythm, being a drummer as well i did the following:

sixteenth note alt pick runs while wahing in quarter note triplets, ... itwas insane!!!!!!!!!!

stuff like that makes it more fun in the end