I like the Ken Onion index opening folders. The pocket opening folders I own don't always open when they are removed and you have to plan on using the thumb stud if the have one. Reliability is the key for me. The index opening puts you in total control of when it is open and only uses one hand with little effort. You end up in a sabre grip which I prefer. They are legal in almost all locals so that is a plus. They are also very cheap and not considered tatical folders so that will help in court if you ever have to actually use them for self defense.