Coming up as a kyu grade I always loved it everytime I learned a new kata. I just couldn't learn enough katas. Now I find at times when sensei thinks it is time for me to start work on a new kata I don't fell I am ready too. And I find that I keep going back to some of the earlier katas to do more work on them. I have a totally different perspective of most of the earlier katas than I did when I first learned them.