The Shades one isn't too bad, but I don't like the text. I can't really think of a good text style for the sig, I would probably have to see some. The FMA one is imho, very meh. Especially the B&W one. I'm not sure, because I don't know how much you actually did to the sigs, but the simple style doesn't really work when someone tries to make it simple by not doing much to the sig. Simple sigs are better when the premise and look of the sig is simple, but there is still alot of time and effort going into the signatures. Forgive me if you did put alot of work into the sigs.
I think that the second one is the best of the three. They 1st one is the best made, like it looks like you put the most skill and time in to that sig. But the sig itself just isn't very eye catching, or just plainly awesome.