Take a chill pill
We’re not exactly sure how to answer this one for you. One reason could certainly be the types of roles that British cinema has. James Bond is definitely a serious, stoic role that gets worldwide recognition. Other movies with serious roles are the popular dramas Downton Abbey and The Crown.
And of course, let us not forget about Shakespeare, who was rather stoic. Perhaps if you watch some lighter British films, you might get a different feeling about British people in general. May we suggest the movie Austin Powers? Austin “Danger” Powers may be serious about his mission to stop Dr. Evil, but he certainly maintains a fun personality.