With regards to the Pinan / Heian series of Kata, what is so important about them. prior to their creation the Naihanchi / Tekki series were the Kata of Choice. I don't practice these Kata as I find everything I need in Naihanchi, Chil Sung Ee Ro Hyung, Bassai and Niseishi kata. the rest is via Ashihara Kata.
Now many Okinawan styles don't practice these kata and some of the old masters described these kata as nothing more than training Kata. Also why practice them if one also practices Kushanku / Kanku Dai etc.
What are your thoughts on these kata, do you feel they are the core of Karate (even though the Pinan series is much younger than Karate )