How does one go about selecting a good carving Knife?  Here is my selection criteria: 

A good knife must cut well and keep a sharp edge with normal cutting.  This means
that is should contain enough carbon to allow the blade to be re-sharpened or
stropped when dull.  This means that the metal won't be as hard as stainless steel.
The knife should feel good in your hand.  This means a good feeling handle.  
If your hand is uncomfortable you will find that you will be leaving that knife in the 
tool box and buying another one.  Make sure when you buy the knife that you take
time to make sure it is a good fit.
You should buy the best knife you can afford.
The knife should look good.  If you pay "big money" for it, by golly, it should look
like you paid a lot for it.  
Ask other carvers what they use and ask if you can try one from their toolbox.
Choose a knife that is well known.
Stay away from homemade knives.  Leave the knife making to a professional.
Finally, select a knife for your particular needs.  Some examples:  A shorter knife 
blade means greater control.  A long blade doesn't mean you can't use it for detail.  
The shape of the point can make it a detail blade.  A chip carving knife makes a great 
knife for doing stop cuts.  A curved knife makes a good detail knife for doing eyes.  
As you become more experienced you will find out the blade shapes that you will need.  


Remember,  never re-sharpen a knife unless you break it, chip it or need to re-shape
the blade. Only strop.  This will prolong the life of your knife.