On the first one, "la graphique" isn't french lol.
Really liked the second one, I can totally see an artist using it, very professional.
Fifth one, I really like the texture on these guys but font is difficult to ready and don't seem to fit into the cover, otherwise it's very good.
For the other ones, I do feel like it's generic with some GFX packs that can be found on the internet, make them more unique
Hope this helped, keep it up!