Mental health psychologist Marty Timbeck advised people to work on their weaknesses. He said, when you're remediating your weaknesses and you're trying to get better, are the things you're not good at? There has been research done by marty and others on this idea. But there are very few true, high quality, random assignment, controlled trials where you actually try to get people to use their signatures tegths more.
Also: why do we like what we like?