The David Tennant Treat 4 Today is an interview David Tennant gave to the New York edition of Time Out magazine about Richard II (and Broadchurch) in March this year.
The first question asked was 'What about the role of Richard II drew you in?'
David's reply was 'I was just fascinated by this capricious and quite likeable character who by the end you feel such great empathy and sympathy for. He’s far from a heroic king, yet he achieves this kind of heroic status by the end through the power of his rhetoric and his wit.
I suppose there are more famous kings in Shakespeare’s plays, but Richard II had always particularly appealed to me. He’s a bit unknowable and surprising.'
Link to the interview
Richard II section of DavidTennantOnTwitter.com