My wife watches these, especially the historical dramas (which are often some variety of portal fantasy).

> She tells me that, in contrast to Western productions, they show more feelings and are less "cold" when interacting with each other.

This reads as pretty extreme over-acting, to me. Think, the very most over-the-top acting from '40s and '50s US film musicals. But, how much your actors should be acting and how much they should be ACTING! is a matter of taste, I suppose.