You can't get on by putting out wall after wall. Especially when the walls have absolutely nothing to them, like yours. You have to put out things that show improve in each wall. You can't just make a hundred walls with just about the same detail to each one. You have to explore new things and try them out. If it doesn't look good don't down yourself becuase it's something new and just keep trying new things that are appealing to the human eye.Originality is a big part of it also. Just be you. Your walls are very simple and really aren't that eye cathing becuase there aren't anything to them. IMO it's your whole style of design that's not appealing.