I like your layout for the Vampire case, but personally I think that Mark Brooks artwork you used for the background is pretty hideous... I like the B&W version better than the full colour one, but either would look much much better with actual Capcom art if you ask me.
The Soul Calibur cover looks pretty good, but I think the pictures of Kilik and Taki look quite jarring. I think if it had a uniform CG look it'd look a lot better.
On another note, although I guess it won't bother a lot of people here, alot of the text on the Japanese version covers looks really hokey, if not downright broken. They would look a lot more appealing to me at least if they were more modeled after the original Japanese covers. Also, I dunno if it's a template thing, but the bottom of the spine shouldn't say SEGA for non-SEGA games. Most Japanese game cases (Dreamcast included) has the developer or publisher's logo on the spine, not the hardware manufacturer's (SEGA, in this case).
The PAL template looks good (far better than the atrocious actual PAL cases), but you need to lose the SEGA logo on the top right beneath the Dreamcast logo. Soul Calibur isn't a SEGA game, and it's quite an awkward place for a company logo, anyway.
Great work all in all. Looking forward to seeing more stuff from you.