I got idea for this little research when I prepared list of components to buy. I wanted to know which component values are most commonly used in pedals so I could get more of them and less of ones that are less likely to be used. So I made simple application that goes through layout gallery and counts all resistor and capacitor values. I used 130 projects of all pedal kinds: overdrives, boosters, fuzzes, octavers, compressors, wahs, etc.
Common resistor values
Common capacitor values
I hope this will help you next time you plan shopping for components 🙂