I was disappointed that Murray Gold never re-used "The Doctor's Theme" (aka "Flavia's Theme") from Series One through Four in Series Five. To me, the use of that leitmotif really helps express the idea of the Doctor as this ancient, mysterious being that's far more than he looks like on the outside, and also preserves a sense of the continuity of the character between regenerations.
But I do absolutely adore "The Eleventh Doctor's Theme," too!
