I like the Villa sig, yet, there are a few things I would change. There are a few too many bright colours in it and the badge and text need a little work. I think you've sharpened the background a little and although it looks good, you've perhaps, overdone it. That said, the background is still one of your best and for somebody who's out of ideas, a very good sig.
Right, the Lewis Hamilton sig. It looks good although I feel you may have used 1 or 2 too many light textures. I see what you've gone for but you could have tried putting a large-sized faded circle brush and then changed the blending options, in a few places. Other than that, the text, looks great although I feel it would look better towards the top-right.
Keep it up Culli! I'm looking forward to seeing more of your work!