I know a lot of you are enamored with iron tsubas, and somehow dislike the bling shakudo ones. I'm a great admirer of the latter, as I truly enjoy the meticulous works of inserts and carving, and gold tones give them relief and vibrancy.    That said, I'm genuinely trying to learn how to appreciate the iron ones, which so far I don't "get". Is there a good place to start? What should I pay attention to as a criteria for quality? I've tried the iron bones thing - and I also tried to enmesh myse