The Original one is sexy, no mistakes but the D looks a little like C... You might make it smaller.
The liquid one looks too squishy or whatever it's called, because the letters are stuck to the border(the circle) which doesn't look so good.
The Metal one is real cool, but same mistake as the Original one, try to re-size the circle or the letter D or the whole letters, so it looks cooler.
Thanks for it bro, and if you do what I say I'll add it to the first post.
PS: there's a logo fight between iHopz and proxun, the one who makes the best gets his logo on the first post