I approve of the whole tattoo thing. Those who object... who really cares.
If I were to tattoo a phrase it would be “That which does not kill us, makes us stronger.” I always liked it and it has helped me through very tough times.
What do you have it narrowed down to?
For a Blade Runner Unicorn how about this:
I have to admit that unicorns will never be the same for me after seeing Miss Penny talk about the unicorn in Absinthe