David Tennant has said on numerous occasions that playing the Doctor is his dream job. Well, an enterprising individual known asderooftrouser on LiveJournal hasdiscovered proof that Tennant held that opinion as long ago as 1988. Click here to see an excerpt from a 1988 edition of "The Grammarian", a publication of Tennant's alma mater, Paisley Grammar School. Drooftrouser has a transcript of the articlehere, and a photocopy of the original article here. The article refers to Tennant as David MacDonald, his birth name; he adopted Tennant as a stage name because there was another David MacDonald in Actors' Equity.
In the article, Tennant says that he has two screen idols: John Cleese andDerek Jacobi. (Cleese made a cameo appearance in the 1979 Doctor Who story City of Death, and Jacobi appeared opposite Tennant as the mysterious Professor Yana in the episode Utopia earlier this year.)
The "Grammarian" article says: "There is however one particular role which David would love to play – Dr. WHO. The reason? 'I have a fettish [sic] about men dressed in plastic suits !!!!' " It concludes: "Who knows, maybe one day David will be as famous as Peter Howitt (Joey, from "BREAD") who was also a pupil at Paisley Grammar School."
(Thanks to The Researcher on the Doctor Who Forum at Outpost Gallifrey.)