I think I am developing a serious crush on Martin Freeman
He's so damn adorable I just want to hug him.
Also, this line of dialog from the Sherlock pilot (from, I presume, that last scene with Sherlock and John talking after [spoiler, spoiler]) that didn't make it to the final episode. (No, I haven't seen the pilot, but there's a clip of it floating around the intertubes. It looks hilarious.)
John: I've seen men die before. Good men. Friends of mine. I thought I'd never sleep again. [beat] I'll sleep fine tonight.
As simply gorgeous as Benedict Cumberbatch is in this series (and oh, he is), Martin's... well, ordinariness has a warm sort of appeal, and he's given the typically bumbling Watson a very serious on-screen presence. Also he's adorable, but I might have mentioned that already.