If you are doing this for a client, you should really be prepared to have to answer a few questions, probably along the lines of the ones asked here. Clients, who usually lack the talent or time to do this stuff themselves often tend to say things like "I like this one, make it twice as big by tomorrow" or "I don't like red, let's make this thing here green." And when that happens, you need to be able to defend your choice of color,style,etc, and you still need to make them happy. You also need to understand that you need to be able to explain to them why you have chosen to do something, in a way that they can a) understand and b) feel comfortable with.
So, everytime someone asks you something, you should take a minute, put down a well written, simple answer. And keep it polite.
So, this really isn't c&c on your actual piece(sorry about that) but rather a pointer to something that is going to be very helpful if you plan to make it as an artist or designer.