I think you did a good version of the Love/Hate design. If you're concerned about it being off-center, you could add some sort of embellishment to one side to balance it. Painted flowers, buttons, a ribbon bow, whatever you like.
Also, a fellow named Kevin Pease makes very similar designs, only far more elaborate and incredibly cool! They're called ambigrams, and they're meant to be read the exact same from more than one vantage point. Forwards and backwards, upside-down and right-side-up, etc. See all his stuff at cerulean.st