Depending on how the skull is used, Skull tattoos have a lot of different meaning. With large, gaping, eye sockets a human skull can look very visually striking. However, the skull has symbolised by most cultures as a symbol of death. Skull tattoos show that there is no fear of death to wearer. He has accepted their own mortality and is actually pretty cool about the whole thing. They could also be used as a reminder of death and should therefore live each day to the full.
Some skull tattoo designs can be made to look quite scary, colorful skull tattoos can be quite the opposite, Otherwise Dragon shows strength, power and protection. So, there are some meaning for them individually such as for a skull power over death, feelings of death or morning and dragon can symbolize power strength ,or even luck. Wearer them self is generally determined the meaning of a tattoo clearly.