[dennisw]

Obama still has a lot of work to catch up with Buchanan in the 'least manly' race. Buchanan was an open "dandy" whose 'friend' William King lived with him at the White House. Jackson called Buchanan and King "Mrs Nancy and Aunt Fancy". Aaron Brown referred to them as married "Buchanan and his wife".

True. http://en.wikipedia.org/wiki/James_Buchanan
He was pretty much a flop and among the worst Presidents

[BenKenobi]

Ol’ Rough n’ Ready deserves a mention.

My list:

George Washington
Andrew Jackson
Zachary Taylor
Ulysses S. Grant
Teddy Roosevelt

Hon. Mention, WH Harrison.

Least Manly

James Buchanan
Barack Obama
Jimmy Carter
Woodrow Wilson
Milliard Fillmore