I'd say smell is the most powerful of all the senses. Sure, I can't imagine how my world would be without my sight or hearing, but smell has the ability to transport you back in time in a way the other senses cannot. Some may scoff and shake their heads and say I'm exaggerating (like usual), but then tell me how I find myself sitting at home alone on Christmas eve, feeling all sorts of pains after catching a whiff of returned belongings. Suddenly it's like the past five weeks (!!!!) never happened, and I'm transported back between familiar sheets while the familiar sound of the streetcar outside lulls me to sleep.
Eight days until a new year and a new start. They can't come soon enough.