Gap / Personal Year?

How frowned upon is taking a year off? ~4 years of experience, across a few industries. I'd take some personal time, take the PE in the meantime, and hopefully return as a licensed engineer. I'm young, have never lived outside my town, want to travel (and potentially move), and am worried if I don't do it now I never will. Not sure how common it is in the industry to see a ~year gap in one's resume.