you know what's the problem for me , as many ideas
I have ,there is always a game that already did it in
some form , which I hate because it makes me feel
like I am not original but sadly thats just how the dice rolls , i mean even angry birds used the exact concept
design of earlier games ,but it was definitely more
successful as those others so I don't care anymore about using concepts that has been used before , now I just say screw it and do it .

I have noticed that ,even though concepts are being done over and over again ,the only thing you need to do is be better at the addictive elements of your game vs the rest , if people would rather waste their time on your game than the rest which uses same concepts then your going to make money ,addiction is key ,got to make people your game junkies.