Movie #1 - Secret Smile

This had a nice twist at the end but girlfriend was just plain stupid for never changing her locks when she broke up with him. I had a scary ex boyfriend once too although he wasn't remotely cute or Scottish, and I changed the locks while he was asleep one morning. You don't see me hiding out in Australia.
This is David's scary side and he doesn't show much else in this movie besides his "oh" face. Still he wasn't that scary. Richard Greico is scarier.
Movie #2 - Recovery

So this is David's specialty character side. Sorry, can't find a better term. :) Sure there's some depth and heart break but still...mostly just one dimensional.
Movie #3 - Casanova

He's superb at goofy but for the love of god, I could only take about 30 minutes of this. This was incredibly fluffy even for Russel T. Davies.
And that is why Christopher Eccleston was a better Doctor.
Special Mention - Jude.

This is just an awful, awful movie since there are not one but three dead babies. However it does star Christopher Eccleston as Jude and David Tennant as I believe "Drunken Undergraduate". But David says his one line with such passion that he stands out completely from the other drunken students. It's just impossible to forget him.