I don't like shaking hands. Hands are tools and tools get dirty and exchanging tools is the same as exchanging germs. I am all too aware of where I put my tools, the places I scratch, the things I touch. For this reason I spare you the exchange of microbial spores and other germs -- please spare me from your filth too.
I really don't know why the ritual of shaking hands is still such a common practise. Personally, I'd rather hug somebody than shake hands with them. During a hug, there are layers of cloth separating actual skin-to-skin contact. Truthfully, it is not really the contact with another person's body that bothers me. It is touching someone else's hands. As I said, hands are dirty. It is our major manipulative tool. Even a cheek to cheek hug or a kiss on the cheek is more hygienic than a hand shake.
In Korea there are many an opportunity to share hand germs. In subway stations, escalators, buses and the like, are hand-bars to hold on to. I refrain from touching these at all cost. (My balance has improved tremendously!) Elevator buttons I often press with my wrist or the back of my knuckles. Doorhandles I open from behind my jacket, or with my knees. I push the handle to flush public toilets with my feet or with toilet paper wrapped around my hand.
Whenever I enter my home, practically the first thing I do is wash my hands.
A few months ago I gave a public speech on "Two 'Profitable' Things for a Christian from Romantic Poetry." For most the public speaking would be their worst fear. For me it was the idea of shaking hands with all the people afterwards. Even now I cringe at the thought.
One thing I appreciate about Korea is the bow. Bowing is not always a substitute for handshaking, but one can often get away with a bow instead of shaking hands. When I was in China recently, I was distraught that they don't bow.
To my friends, rather give me a personal hug, than shaking my hand. Or if the hug is too intimate for you, how about the fist-bump. With the fist-bump there is little exchange of germs and it looks cool to boot. Or let's bow. A friendly broad smile would equally suffice.