i love it! the only thing that looks a bit of the the little finger on his left hand. but other then that u've done a great job. i love the way you've detailed the tea set and the way you've painted it is wonderful C=
There are a lot of L (or DN) fanarts out there which explore L's oddities too comically or too dramatically or even for explicit fandom's sake, but I think this piece just balanced the right amount of conservativeness with expressiveness to bring out an L who is as odd as he always is, yet also have a sense of depth in personality.
Plus, the still-life quality on the teawares is simple a wonderful aspect in this picture to show that the artist (you) was not only trying to doodle out a fanart, but was actually dedicated to producing something of quality.
Might be even better if the solidity of the silverwares can be contrasted against a softer rendering of his hair (though his hair could really be tousled after days without wash).