I am an absolute nutcase when it comes to F&F, i crave precision and am often disappointed with knives i receive in this dept.
There are a few knives though that rarely disappoint, production, obviously Chris Reeve is at the top, it is very rare to get a Sebenza that isnt very close to perfection. Microtech is also very good, but not quite as consistant, but i do own several of them that are truly flawless in every respect.
In customs, i have actually found it even tougher to be satisfied, even with the top makers, their knives do vary quite a bit in F&F, i have seen at least one flawed knife from just about every custom maker, however, there are a few who get it right most of the time, at the top of my list is JW Smith, this guy is a machine, his knives are just as perfect as a knife can get, followed closely by Tom Mayo, Tom's TnTs are just so amazingly smooth and precise, unless you have actually examined one in person, you really can't know what i mean, they are about as good as it gets and its an awesome design. Next, i would have to put Phil Boguszewski, his flippers are just as smooth as silk and they are so well made, its like a fine swiss watch. Next would be Carson or Mike Obenauf, of course its hard to distinguish between the 2 since Mikes knives are heavily inspired by his mentor's, i believe that Mike's knives are now as good as Kit's in the F&F dept, which is quite a compliment since Kit's knives are so well made. Finally, a name you dont hear a lot about, but Aaron Frederick makes an incredibly smooth, well made tac/utility folder at a very reasonable price for the materials and quality.
Well, thats my take on this topic, and i do put an awful lot of effort into deciding which makers consistantly offer the best quality and F&F and so far, this is what i have found to be true.