Think of your heritage ... your family .... what you truly beleive in deep down .... that should be what your tattoo is.
Also, really think about the placement. Lower back is GREAT, but think about WHERE on the lower back. Do you want it seen in a bathing suit? How about shorts/jeans?
I have my lower back one placed above the jean/bathing suit line. I really like it, but sometimes I wish I had it BELOW that spot.