My ReGENERATION

This represents the end of each era of the Doctor via regeneration. It seems even more befitting now seeming that Matt Smith (the 11th Doctor *the last one on the bottom next to the question mark*) announced his departure of the series this year via the 2013 Christmas Special.
Top to Bottom:
L-R - 1st row: 1st Doctor William Hartnell, 2nd Doctor Patrick Troughton, 3rd Doctor Jon Pertwee, 4th Doctor Tom Baker
L-R – 2nd row: 8th Doctor Paul McGann (in his newer look not the 1996 movie style/look), 7th Doctor Sylvester McCoy, 6th Doctor Colin Baker, 5th Doctor Peter Davison
L-R – 3rd row: 9th Doctor Christopher Eccleston, 10th Doctor David Tennant, 11th Doctor Matt Smith