A "counter argument" to bring up...

Your CEO's thoughts are that the kilt may have a negative "first impression" on a client and "turn them off" to you.

What if a client is homophobic and gets an openly gay counselor? Should that counselor be told to "tone it down" or "don't act gay" to suit the needs of the company because they MAY POSSIBLY SOMEDAY offend someone just by being who they are comfortable being?

What if a racist client gets a [insert ethnicity here] counselor?

What if a sexist man gets a female counselor?

Separate point...

An argument can be made that if you put all the picutres up in the office (great idea BTW) and openly express who you are and your passions that it would make a client feel MORE comfortable. You're showing them pieces of yourself and opening up BEFORE they even say a word! It's much easier to trust someone who puts themselves "out there" like that.