I'm a little picky about my knives. I will carry only a single blade, because the hilt then fits my hand without that second blade sticking up to get in the way. I have on me, right now:
Right belt - Schrade (Old Timer) 70T
Right hip pocket - Kershaw 1560ST
Left front pocket - Schrade (Old Timer) 1040T
Left shirt pocket - diamond whet stick.
I'm left handed, incidentally. Those of you in your wrong mind can switch carry sides.
I was taught that each knife shape and size has a particular purpose. By carrying several sizes, I can cover most occasions of when I need a knife. When I'm hunting big game, I carry a hunting knife in place of the 70T. That knife is pictured here: <http://pic5.picturetrail.com/VOL85/9...9/20802013.jpg