I wouldn't get a sothern cross mate, not that there is anything wrong with them I think its great showing pride its just really unoriginal n its also falling into to "bogan" stereotype.
To educate you on tattoos... The way the ink gets into your system varies over time. That photo of my wings is from when they are quite fresh, thus darker. To have used gray ink would result in a weird effect as the tattoo ages. Tattoos don't stay the same