Here's an interesting article which pretty much says lefties are the boss when it comes to many things!!!
http://health.howstuffworks.com/human-body/parts/left-handed.htm
I'm a leftie so yeah this is somewhat self serving lol
Having faster reflexes doesn't come with its disadvantages however, especially if you're male
http://www.escapistmagazine.com/news/view/86742-Beware-Gamers-Fast-Reflexes-Means-Short-Sex
Again, I'm a chick so this doesn't apply to me haha but there is always nasal spray guys lol
The fact that I'm a leftie might also explain why I'm drawn to Free For All