"God is greater than the highs and lows" - Romans I would love to have this one on the back of my neck. It's not too visible, and you use your neck to look up and down: it represents the highs and lows. This size is perfect for me, too. More even though!
The more unique your tattoo is, more chances to represent you. Do not let other influence your decision. Just create it in your mind and then try to draw it or let someone draw it for you. That was you know for sure there is no one who has the same as you