Well I may be naive here, but it seems to me that if you're going to be successful you're going to work with people you like - colleagues, prospects or bosses. I can't imagine being successful selling to folks you just don't like.
On a related matter, a former boss (whom I'm quite fond of) once said that "I'm too old to work with a*****s anymore." Being of "a certain age," I couldn't agree more.
--Scott