About 30 soaps and a few creams, which I find is too many, and I just ordered 3 more right before the 2014 restraint.
The right number for me should be somewhere around 10 to 12.
I'll get there someday.
Right now I use three different ones depending on how I feel on any given day. I use Proraso Green Soap, TOBS Sandalwood Cream, and Geo F. Trumper Limes Cream.
I have about 40 soaps and a dozen creams. I use the creams on sundays. I rotate the soaps on the other days. It's working well. I have enough for many years, and there are still a bunch out there I want to try, but so far so good. . .