The Hand Shake vs. The Fist Bump

So, I was at the gym last night and I saw my trainer training someone (surprise, surprise). I was sweating my balls off on the stair master as someone came out of the changing room. It must've been a friend or another customer of my trainer because he went to say bye to him as he was leaving. He gave him a good old fashioned hand shake. On the other hand, whenever I salute him, I give him the fist bump.

So what's the deal? Some get a fist bump and some get a hand shake? I guess that's the way it works because I am the same way. Some of my friends are shakers while some others are bumpers. I don't think it has anything to do with how close you are with someone, but a hand shake does feel more formal. Ex: You'd never fist bump at an interview (however, that would be fucking awesome). I have some of my very close friends that I still shake hands with and others, i'll just do the bump with. Sometimes, when i'll meet someone for the first time, i'll give em a fist bump and they're cool with that. On occassion, they will even wind up for it. So is it a question of formality, preference, age, gender, race? What is it???

So here's my opinion: I prefer the fist bump. It's cool, it's quick, it's efficient and it looks bad-ass. The hand shake looks more formal and should be used in certain situations. Another advantage of the bump is that you don't need to touch anyone's sweaty, dry, scaly, dirty-just-touched-my-penis hands. Just tap dem knuckles and you're off!

Now, that being said, what do you prefer? Are you a bumper or a shaker? TELL ME NOW!