My design skills are on par with most of the designers I've worked with, and pretty much same goes for coding. I'm not excellent in any, ignoring few bright mom

My design skills are on par with most of the designers I've worked with, and pretty much same goes for coding. I'm not excellent in any, ignoring few bright moments. I've also done game music, play few instruments, and the list goes on. I DO NOT EXCEL in any of those, but that might just be my high standards. However, in the companies I've worked I've always been THE most useful person. Earlier this year, I've started my own company and ran it sucessfully basically by myself. The point being - you probably cannot be excellent at both design and coding but being very good at more than one skill makes you excellent in itself. Exceptions to the rule always apply.