Very few films, especially these days, pull off a film that has long, pausing scenes of dialogue and no action. I suppose Romantic Comedies fit that description, but they're very light-hearted and aren't really dealing with any serious points. One of the few films I can think of that has nothing but talking is Twelve Angry Men and that was made a good 60 years ago.
The King's Speech is fantastic, with brilliant performances from everyone in it, but especially from Colin Firth (as the Duke of York/Prince Albert/King George VI/Bertie), Geoffrey Rush (Lionel Logue) and Helena Bonham Carter (the Duchess of York/Queen Elizabeth/the Queen Mother).
The film covers the five years surrounding King George VI's ascension to the British throne, as his older brother David (King Edward VIII) abdicates. But King George VI suffered from a terrible stammer which made him unsuitable for public life, so he goes to a speech therapist - Lionel Logue - for help.
It may not sound a very interesting plot, but believe me, this film is brilliant. It has been nominated for twelve Academy Awards (Best Picture, Best Film Editing, Best Art Direction, Best Costume Design, Best Sound Mixing, Best Director, Best Actor, Best Supporting Actor, Best Supporting Actress, Best Original Screenplay, Best Original Score and Best Cinematography) and fourteen BAFTAs (Best Film, Outstanding British Film, Best Editing, Best Production Design, Best Costume Design, Best Sound, Best Makeup and Hair, Best Actor in a Leading Role, Best Direction, Best Actor in a Supporting Role, Best Actress in a Supporting Role , Best Original Screenplay, Best Film Music and Best Cinematography) and it deserves every one of them.
If you haven't seen this film yet, I suggest you do so. You won't regret it.