Remember you asked for opinions, so I really don’t know why you’re bringing my martial arts background in this. Granted I did state about what I saw from the black belts I’ve come across. While you may not trying to be argumentative, the tone of your post seems (in my opinion) very skeptical of what I’ve written . . . like a just made the post to make you mad and get a laugh out of it. That wasn’t my intention, you asked for opinion and I gave mine. As far as my training maybe I have the time to train in karate, iaido and kendo because that’s all I do. Maybe I train on a rotating schedule, alternating iaido and kendo practice in the morning and karate in evening. I never said you weren’t good at kata, and etc, it seems silly for me to judge the skill of someone I’ve never trained with and don’t know. I was talking about the black belts I’ve come across and have trained with for years. This is what I’ve noticed during my time with them that, they have a strong interest or higher skill level in certain areas but not overall. We all have our favorite area but to solely focus on it and neglect the others will hamper our progress. If you’re serious about running your own dojo talk to your sensei about it and ask to be his/her to be an assistant instructor so you can learn the ropes of running a dojo from teaching yours tyle to the business aspect of it.