not bad... I like how the guy in the first one sticks out with the rim lighting.... Your text is really hard to see though. That would be my biggest suggestion, Change up your text and make it a bit more visible... at first glance I didn't even notice it specially in the first one.
Well your first post here isn't bad
Anyway I like these sigs. Good job. But still I would pick a little on the blending of Keira on first one, Lev told it is nice, but I think that you could have tried to blend her in little more. But hey, it is just my opinion