well i have many tattoos and i love artwork but when i see a tiger i believe it looks more masculine. ive seen a few other geisha tattoos on girls and i thought they were very beautiful its very unique and can be colourful if thats what u like. I think u would get much more compliments.......i would go with the geisha artwork.
Why don't you incorporate both things together. I don't think a tiger necessarily has to be masculine, it can have softer features, more defined feminine eyes. There are lots of ways to incorporate both together and keep it feminine. If you're not into both, go for the geisha artwork.