I want to know what makes glycerin-based soaps so popular.

I like glycerin-based soap because:

1) They are inexpensive

2) They perform really well

3) They are everywhere and everybody uses them

4) They are made in a wider variety of scents

5) They are easier to lather and to work with

6) They are milder and gentler to the skin

7) All of the above

8) If I find one I like, I will use them

9) I will die before I use one