Allow me to reintroduce myself....
I have always strived for balance in my tattoos. In fact, it's bothering me right now that I have both sides of my right knee open. Then again, as I start to run low on real estate, I notice every single blank spot.
And I'm with Diehardonvhs: you get one back, your biggest uninterrupted canvas. If you want a ton of coverage, you'd be a fool not to give serious thought and planning to placement.