Different personal logo ideas

These are different ideas I have for a personal mark. I'm using option "f" mostly, but have not decided which one I like.

Some are based on kanjis. The anchor is related to my home town, Buenos Aires. A friend fell in love with the brains one, so I'll probably not use that.

I'd like to know what you think. Anyone that deserves keep exploring or should I change focus and try something different?