I imagine they wouldn't be, but not all the blown ones have hearts and flowers, we have some cool lizards, scribble like designs as well as ones that have a like a tiger thing going on... but every ones taste is different so those might not be for you either.
It never stops amazing me, the ones I think came out the worst are the first ones to sell!
You know what you intended--other people only see what you achieved. The artist is his or her own worst critic--unless they're not a very good artist