I will admit, I did for see that fate when reading the title of the thread.
BUT!!! The OP left his question open to personal opinion so it shouldn't go that route.
I said 8-10%
Another could say "I'm a powerlifter and feel my best at around 15-18%, am at peak strength and don't look sloppy so that's it for me"
While yet another could say "I just like to lift weights and look good so I stay at 12ish% and I find that ideal. It's easy to maintain."
All of those are perfectly fine answers and would not get any criticism from me (shouldn't get any criticism from anyone actually)
The OP is trying to get some people's feedback and opinions.
It doesn't have to be taken as gospel or the one and only acceptable answer.
It's an opinion.
I agree with your numbers though