I don't think there is anything wrong with what you are doing, but I hope people understand that there are many, many talented designers out there working for companies with horrendous websites. It's very easy to make a PSD mockup of a single landing page working in a vacuum. However, see how that pretty PSD looks after making its way past meddling founders, overworked devs that don't give a damn about aesthetics, and technology constraints. Building beautiful websites in a business environment is hard.