Sorry for the harsh tone--probably an overreaction--but I think creativity is not the primary variable to optimize for in software development. I recognize that this opinion is a product of where I've gotten stuck in the software stack.
However the OP's advice was basically "don't write tests because they slow you down." They even said that 100% code coverage was "a really bad idea". The OP's attitude was flippant, dangerous, and IMO, stupid. Don't follow this advice.