I was thinking especially of the acting in dramas. It's particularly noticeable when male actors do it. The way Meryl Streep or maybe David Duchovny would speak when acting in the early 90's. It always seems like a distinctive style to me and I was wondering what it was.
As someone who watches a lot of television and movies, and who grew up in the 90s, I have no idea what you're talking about. You're gonna have to post a few examples.