The simple fact you made a Buffy vampire mask is amazing in itself and quite awesome.I'd agree with the above comment and maybe smooth it out more, but also, it may just be the lighting or it doesn't show all the details in the photo, but maybe over exaggerate the lines that form between all the bunched up facial muscles. That just the type of thing I notice first when I see a Whedon vampire. And maybe make the exaggerated vampire brow connect more thickly with the bridge of the nose.I dunno, thier faces also just sorta remind me of snarling big cats, so maybe images of those could help too for a reference? Like this happy fellow here [link] I hope this helps? And great job, by the way.