I did this when I got my black belt. The katas I liked practicing were Bassai, Jion, Unsu and Heian Godan.
My personal kata had a similar embusen to Jion, with a lot of seizing and balance disruption leading into strikes as opposed to joint manipulation leading to strikes you normally see in kata. It had a lot of fast series of strikes. I'd say it was more Chinese in flavour than Okinawan and Japanese. It was a collection of the most effective self defence and fighting techniques I knew.
I wish I remembered it. It was surprisingly good, but I doubt it ever had the content of an original kata. I didn't know enough then.
A valuable exercise though. Perhaps we all should do something similar even if we aren't kata guys. Like in a flow drill with a partner etc. Anyway, the exercise helped me to understand more bunkai and concepts like evasion and distancing.
It takes a village to stone somebody to death.