Matilda is an A-player salesperson in her organization. She always calls customers with the biggest smile on her face, and in return, they leave her top reviews. She's never missed her quotas. She cheers on her colleagues and they all praise her vibrant personality.

Her manager, Agatha, wishes she could train the rest of the sales team to be just like Matilda. "Is there a course for learning how to be an extrovert?" she wonders.

We would all love to have a whole team of Matilda, and Agatha's question may strike a chord. Is there such a thing as personality training?

It turns out that the more important question is whether personality is what you should be training for. Personalities come in all shapes and sizes-and each has its strengths. But ultimately it's skills and results that determine success. Where personality fits into that is a more complicated discussion.