I've always thought it was a combination: a thank you that the person took time to talk to you and with you about the position (especially a non-HR employee), a follow up to the interview if there were other questions or to send a work sample as discussed during the interview, and to state again something that marks you as a fit for the position.
I've always thought it was a combination: a thank you that the person took time to talk to you and with you about the position (especially a non-HR employee), a follow up to the interview if there were other questions or to send a work sample as discussed during the interview, and to state again something that marks you as a fit for the position.