I can see another reason to keep the number of knots down that I've been struggling with lately. I've been learning some new knots just for fun and found that for some I could have sworn I had down cold I had to actually look up. If you stick with 10-15 I think you will have an easier time keeping in practice and making sure that you have them down to the point where you can do them when you're hungry, tired, cold and unfocused but still be able to find one that's right for the job


And to add to the list I one I think you should learn that I wonder how many people bother with: Monkey's Fist (http://www.igkt.net/beginners/monkeys-fist.php)