Yet I'd say my characters are mid-depth POVs. I find it particularly useful when two adversarial characters' internal responses don't match their spoken words in an exchange. This piques readers' interest and expectations, and often injects humor (a private joke the reader and protagonist know, but the antagonist does not).

I don't see deep pov used a lot in literary fiction. I don't see it alot in mystery/suspense genre, not because it wouldn't work, but because many writers prefer to keep secrets from the reader that the POV character knows, and that doesn't work with deep POV. I would love to read a deep POV mystery.
Historicals are another genre that don't use a lot of deep POV, thought they could (and should imo), because of the emphasis on description and setting.
First Person isn't automatically deep POV, and the use of the narrator voice conflicts with deep POV, but there are other tools of deep POV that get used a lot.
This is used quite a lot by romance and fantasy. I think it could be quite useful for thriller, but I don't tend to read those so I can't say if anyone's using them.
Deep POV is used a lot in YA, but MG is harder because those readers tend to lack the world experience required to understand deep POV without explanation.

Thanks for re-subscribing, Deb!

Awesome. If you're looking to go deeper into any of these topics, I've been writing here at WITS for a few years, plus there's more on my own blog.

Glad you found it helpful.

Thanks, Jenny!