I like Thomas Mulcair for the same reason Abraham Lincoln liked Ulysses S. Grant.
As President Lincoln famously said of Grant, the Commanding General of the Union Army in America's great Civil War: "I can't spare that man. He fights!"
Legend has it that the president was responding to a silly delegation of people who wanted Grant cashiered because he was reported to be too fond of whisky. The President, who was personally an abstemious man, but one with a sense of humour, inquired of them what it was Grant drank … so that he could send a case of the stuff to the rest of his generals!