"Most watched TV show" should be about total time
If I watch 10 5-minute-episodes, this doesn't really mean that the show should be prominently featured on my profile over a show with 8 episodes that are 1 hour each. How much someone likes a show is best shown by how much time they spend watching it; episode counts are arbitrary and favor sitcoms over real shows.
I do prefer total time though.
I agree it should be a option in settings.
I came here to suggest this. My most watched show is a half hour and has 238 plays, totaling 3 days. While I have multiple hour long shows that have accumulated less plays, totally as high as 7 days of play time.
Therefore I feel that the most watched TV show being displayed on my main profile page is not accurate. I don't think the change should be forced on everyone, so I would like to propose an option in settings to choose either a time-based or a play-based metric for our main page.