Apart from the introductions and special announcements (only if the client asks for it),
we usually let the music selection spin the vibes without talk over songs, as we know that a tailored sequence is the best key to fill the dancefloor.
But since anyone has a different vision of what he wants at his event, we always recommend to show during plannings the mood of interaction that you’d like to have, so please specify in the rating request if you want the dj to MC or not necessarily.