Background is boring, should have merged the background colour and floor using fog or a curved plane. The reflections are a bit excessive.
You should use AO with some better settings, you should consider using a faked GI rig to clean up the lighting.
Spec is too liberal, consider an alternate shader. Otherwise it comes off as "90s". Materials on the plane/bin/table need a lot of work!
Composition is kind of poor, the sig has a lot of space that looks 'wasted by chance' rather than by design, the avy will look strange when shrunk, always try to work at the correct resolution because resizing is bad out of render. The tori's pose is pretty stiff too
Example using faked GI, AO sub/add, toon shader, reflections etc. I removed the high spec because it was way too sharp for me, I like that smooth look.
Just some things to consider...