Your sig reminds me of the sci-fi genre. Mostly 'The Matrix', without the binary code. If I didn't see the line well, I would have thought it was like those that appear on an EKG. But what is really catching about it is the green tones. It, also, makes me think about anything that's refreshing, like mint.
It does look like ice. I like how every letter overlaps the other. It's an interesting style, even for glassy text. Also, I love the cracks. Not just the cracks from the text, but from the whole picture. They're similar to the ice I've seen in 'The Day After Tomorrow' (the CG effects for the buildings.) Finally, when I see this pic, I think of...cobwebs. *shrugs* Btw, I was not aiming for a joke. Honest. :]
Your signature gives an air of mystery. Purple tones and black are a great combination for it. I'm not sure if that was your aim, but I like it. Also, the typography is great. The most catching is 'REBEL Serenity'. I'm very, very fond of clean, glowing text. X]