On this site's Partridge Family forum currently, an opinion regarding David Soul sporting a mustache has been stated:

"It kind of reminds me of David Soul sporting one in the last season of Starsky & Hutch.
It kind of combined with the long sideburns, makes their characters look sleazy."

Here is David clean-shaven:

304622

And as seen in the post from the forum I referenced:

304623

What is your preference for David's look?

I'm reminded several years ago I grew a mustache with van dyke, and a friend saw me
afterward for the first time. Right away she said "I like that," referring to my different
look, which surprised me.

Without