If you've seen the Granada series, you most likely have observed all the ENERGY Jeremy Brett's performance as Holmes. His is a hyperactive Holmes, restless, twitching for action-- as opposed to Basil Rathbone's cool and calculating Holmes, the guy rarely taken by surprise.
And since GMD was released in the mid-80's, about the same time the Granada series was originally airing, I believe a lot of the characterization of Basil of Baker Street was taken from Brett's version.