Oh my goodness. I want a "joy" tattoo so badly ever since last summer. I love this font. I'm not sure about the placement, but it's pretty cool. Plus, this would be a meaningful tattoo for me, not just a frivolous thing.
an enso represents a journey. Buddhist monks draw these with brushes in journals; an open enso signifies an ongoing journey. In Zen Buddhist painting, ensō symbolizes a moment when the mind is free to simply let the body/spirit create.