I just finished this Today, I think it turned out rather well, although I had some difficulty with the blasted camera... I finally put my giant sketch pad to use, it's a lovely 18" x 24". Now all I need is a bigger scanner and I wouldn't have problems with the graphite reflecting the flash.
I had better stick with good old 8.5" x 11"
Reference picture: [link]
Feel free to compare!
Oh yes, and if you plan on drawing David Tennant in the future, prepare to go absolutely crazy trying to get his nose right...
Done in pencils
Doctor Who is (c) BBC