Absolutely. In their mind, more is better, always.
They are also the same patients who don't understand you can't always do everything they want or if you do, it won't look like it did on someone else. They ignore the fact that your body has underlying structures and other physical features that limit what can be done.
Like lip fillers don't change the distance between your nose and your chin. The same size boobs look completely different with different width of the shoulders or waist. The size/shape of teeth are heavily influenced by your other teeth, the shape of your jaw, etc.