I don't know why I worry about "too many" of my ideas being for the same genres/structures when I'm on a website where people generally make 90% RPGs and VNs...
Just dont worry about creative shit (okay, do to some degree, but not like that)
People who like your shit will find it. There's about a trillion game devs out there, just like indie film makers and comic artists, etc. Don't kill yourself chasing some imaginary dream of being the only unique person in the world.