Yes, sorry about that.  I do not work with any sole-proprietors and my business is not sole proprietor and I understood this person to be looking to understand the alternatives to being sole-proprietor. 

In other words, assumed he was considering LLC or S-Corp, where I would recommend S-Corp for the reasons mentioned.  I was a sole-proprietor 10 years ago when I started but am an S-Corp now.

I have clients who are LLC, but file taxes as an S-Corp.  In fact, all my clients do S-Corp or C-Corp.