During my time in aikido, I got more arrogant and then less arrogant. I peaked around 3rd kyu, which is around the time I started to think about how much I didn't know, rather than how much I did.
Unfortunately Justin, what I found is that the higher the rank the more arrogant they are, closed their mind to new ideas and advises. This makes me thinking about what I expect to become as a person in aikido? because I have decided to deepen my learning and knowledge about aikido but don't want ending up like those people.
To Ron, I found the same problem also, but what do you mean by the education level of aikidoka is significantly higher than most other martial arts?