If you want something different, some of the CPF crowd likes the Superknife, a well made folder that uses box cutter blades:

http://www.berkeleypoint.com/products/tools/sk2.html

It's not for everyone but it's pretty cool. Sooner or later I'll get one.

FWIW, I have a Spyderco Jester on my keychain and I like it just fine.