I got to say "Other" as I use two, an #80 and a #46.
I use the #80 about 90% of the time, but the #46 sure comes in handy when I have to reshape a tool or make a tool, it removes a lot more steel a lot faster. I used to have the #120 and #80, but I found, for me, the #120 clogged up really quickly and I did not see much of a difference on sharpness. On my skews, I use the #80 then I have a medium diamond hone (#400 ) and then the honing wheel with the compound on it, to get the skews shaving sharp.
Works for me!
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
William Arthur Ward