#16 I like the font, I like the colors. I don't hate the b in the icon, but I don't like the f in the icon with it. I'm open to more abstract symbols too. Its not required that the b be in the symbol.
I like #34 and #35. The b looks like a 6, however. Can we try a capital B, at an angle like you have it rather than the lower-case b? Also, the reason I like the b in this one and the symbol in the logos ranked 1 and 2 is because they remind me of a gear. A capital B at an angle like you have it, might look like two gears together. Also, If the pieces that look like the teeth of the gear looked less pointy, it would remind me less of a circular saw. I don't want people to think of a circular saw when they see my logo. Make sense?