Leading the field with (at the time of writing) 9795 supporters is this great set from GlenBricker. It's 6000 ahead of it's nearest competition and just 205 votes away from the 10,000 support threshold before LEGO will review the suggestion, and possibly turn it into an actual design.
Doctor wise you can pick from Tom Baker, Christopher Eccleston, David Tennant, Matt Smith or Peter Capaldi. Assistants include Rose Tyler, Captain Jack Harkness, Doctor Donna Noble, Amy Pond, River Song and Clara Oswald. There's also a Cyberman and Weeping Angel minifigure in the collection.
Each Doctor and Companion minifigure would come with an item, including the Fourth Doctor's Jelly Babies, the Eleventh Doctor's Fez and Clara's 'Leaf'.
GlenBricker has also designed different TARDIS consoles for alternative sets, you can see Matt Smith's one above.
I've personally felt for ages that LEGO Doctor Who is long overdue, the Character Building sets were OK but not great, this is exactly the kind I have been waiting for. Head over to the LEGO Cuusoo page here and support this set so we can all get our hands on some great Doctor Who LEGO.
UPDATE 13/3 - The set has reached the 10,000 support limit. All we have to do now is wait for it to pass the review. Keep your hopes up and your fingers crossed, hopefully we will be able to get some great Doctor Who LEGO in the very near future.