There are plenty of actors I feel this way about. So many actors play the same character movie after movie. Their mannerisms don't change, their appearance MAYBE slightly changes, their personality doesn't change, their facial expressions don't change.
The only thing that changes is the name of the character, and the costume. Sometimes the plot changes.
Jennifer Aniston is just one of those actresses that plays Jennifer Aniston in pretty much every movie.
Her range is limited, her abilities are limited. She's not very good. But how many popular actors/actresses today can you say do have a large range?