Personal branding logo

This clean and contemporary design uses ligature of lowercase "s" and "f" ---which makes up my initials. I chose this style and color palette to represent the more sophisticated, mature and "evolved designer" in me.

Now I need you guys to help me decide which concept (out of these four) that I should use for my new branding, i.e., top left logo, top right logo, lower left logo, or lower right logo.

Thank you so much for your feedback!