I made a signature using the same render 4 years ago https://i.servimg.com/u/f65/12/75/55/64/1610.png
Hmm, lets see...
first things first, dont use stroke for a text. also remove that pattern on the bg, those lines doesn't feel right. could use more light, i prefer strong lights, its my thing. also the guy is painting, while the signature is fainted into white, it should have more colors, if you want a text so badly, then mait it colorful.
thats all