My favourite episode was the one where he dropped acid while receiving a lapdance from Rani off of The Sarah-Jane Adventures. Definitely the best bit of an otherwise tedious sixteen-part story set in Gallifrey's Citadel.
"The Pillars of Rassilon" wasn't sixteen parts. It only felt
like it was sixteen parts. There was no budget for it, so what we got was fifty minutes of three people talking in an unadorned room. I can't even say that conversation was scintillating. It was, however, interminable.
And I agree with everyone else vis-a-vis Rani. What drugs were you on?