I like the work you did up to a point. I was really impressed with the previous work you've done. Your sigs always looked personal and original (your previous green sig is a great example) until I saw those few Halo sigs.
Don't fall to the darkside cowbell! Stay away from the Halo sigs!!
Really, there are too many of them going around. It's a hackneyed sig-type, whereas all of your other ones are very original. You don't need to wasted your talent on something trite like that. Use your skills for something original like you've done before.