I carry a Spyderco plain on my key chain and used to carry the Spyderco Civilian as my primary in my right pocket, I have since replaced it with the Benchmade Rukus 610, a huge folder with the Ajax lock, and a knife that I can use for cutting chores as well, cutting anything with the Civilian ended your warranty.
The keychain Spyderco is a Ladybug.
I'm in a jurisdiction where I could carry a .500 Smith & Wesson on my hip but no edged instrument whatever. It's a pain in the ass.