-
Hi Metin,
I enjoy your logo.
The only thing I see that I maybe would adjust, would be to bring the letters of your name closer together. For, I see they may be evenly spaced from each other, yet due to their unique individual shapes they look oddly spaced.
Also, the leading looks unequal as well. I would maybe bring your name closer to the web/graphic/design (since it is not related by color to your name.)
I like the dark brown and white combo.

Hi Metin,
I like Yitz version the most. Due to the fact that the white space made from the m and the u is consistent with each other. In the other versions, due to design of letters or affect of black against white, makes that white space look inconsistent.
I like the addition of the blue.