One tattoo design that you may want to consider is the sugar skull tattoo. Sugar skull tattoos are not a main stream tattoo, but they do have a popularity. Sugar skulls are a proud symbol of the Mexican culture. Sugar skull tattoo designs can be.
Applied art commercial art print illustration by Norman Duenas titled "A Butterfly Effect." I really love the artists combination of nature with the human figure/skull and the depiction of a clock. It gives a great sense of the passage of time.