Separating Your Personal and Commercial Design Work

The debate between creative personal work and commercial work is one that has been going on since the design industry was born.
Technically, creativity and commerciality can’t exist without each other – you need funding to continue designing, and there would be nothing to design for pay without creativity.
Is there a difference between so-called “commercial” work and work that’s done purely for the joy of creating? Should they be separated?
A Jumble of Confusion?
Sh