Finding the right balance of power has been a challenge for me.
Started with 2x100w (stereo power amp), went to 15w (too wimpy), 30w (felt awesome, too mushy in the mix), 140w (too stiff, felt lifeless), 50w (kind of meh, but it was the amps fault and not the output), 120w, 100w, 30w, 50w, 90w, 100w.
The the end, my solution was an amp with switchable power options (Dual Rectifier, and I had a Mark V up until recently). With it I can run my crunch channels in 50w, my clean and high gain channels in 100w, and my clean and lead channel can use a tube rectifier while my rhythm channel uses a solid state rectifier.