Do your favorite actors do this? (read below)

In “The Devil Wears Prada,” Meryl Streep several times does a little double-clearing of her throat when she was sits down at her desk. It’s a small thing and easily missed, but it seems very real to me, right in keeping with her character, and is used at just the right times. But now I’ve discovered she uses that same identical vocal tic in a more recent movie, “Iron Lady,” and now I find it annoying, both because Streep’s used in the previous movie (and maybe other movies, too) and because its timing in this movie always feels somehow wrong. It seems to have turned into simply an affectation. Have you noticed that a favorite actor repeatedly uses his or her own little mannerisms? I ask because I’ve always been interested in acting and love studying professionals’ techniques.