The only porridge I eat now and then is semolina porridge. It's quite popular over here though it's usually food for smaller kids or the right stuff if you're ill and have sensitive stomach. Semolina porridge looks more or less like grits.
I'm not that fond of bananas so they're pretty much the last thing I'd like to have porridge from. A working colleague of mine loves bananas and he only eats stage 9 bananas (not shown in your diagram). They have pretty much entirely black skin but he says they taste the sweetest. Maybe the latter would make even better banana porridge.