Smooth vocal sound

Hi Stuart!
Loved your video here on MWTM! I’d like to pick your brain on that smooth vocal sound that you are so good at achieving. Obviously it starts with the source/artist and from there on, the recording chain etc (was it many times a c24 for Queen B?). But then we have the mixing too, whereas an over processed vocal immediately sounds small and thin, and a smooth, big/deep vocal comes from a few great decisions. It’s really an art to get there without losing presence. I bet this topic can be a never ending conversation, but I would be grateful to hear your thought process on this and of course what technical aspects you prefer in order to get there?
Kind Regards!