scl,
I definitely agree with Mistress Zhao in that the word should be slightly arched - it looks much better, especially when you're getting it across your upper back. I think it's hilarious that you want a tattoo that says "Freedom" and then you say that you want a slave tattoo. I know exactly what you should get for a slave tattoo, too :-P As for fonts, I'm afraid that I don't have an opinion either way, really. Something with a somewhat archaic feel to it could be interesting, though sort of thug-life. I think that the fonts that are ornate unto the point where you can barely read them are kind of hot. you'll have to show me before you get it permanently etched on your skin, though. Understand? :-)
xo Choi