thanks for the suggestions! Yeah, I've given up importing Poser models as a lost cause. It'd be nice, but the conversion process just makes it look like crap no matter what I do. Rotoscoping might be a good idea, but I tend to do better free-form (though some reference images to look back at for ideas might be a good idea, I can sketch those by hand)
Inspiration hit me a few hours ago and I've been working since then. I have a fairly good model of a head down, I'm thinking of using that for the character I based off of myself (the character, unlike me, is a recovering drug addict, so he's emaciated and really worn-out looking). Imagine very pale skin, shoulder-length hair, all black clothes, and a big honkin' shovel on his back.
I started with just the basic head shape, in a vertical cross-section, then extruded the heck out of the thing. No eyes, nose, mouth or ears to start with, just the head. Then I modeled an eye socket seperately, and with some rather inventive uses of hooks, I attached it to the face and got all the broken patches working again. Rinse, repeat with the other eye, then used a similar method for the nose and mouth, and that's where I am now. Still fiddling with the basic face geometry, to make the cheekbones stand out more and give it a sunken look. I still need eyeballs, eyelashes, eyebrows, teeth, ears and hair, then I can start working on the rest of the model. I figure once it's done, all the little mistakes I made will either be covered up or too miniscule to notice.
I'm thinking of doing the hair as an unconnected mesh (to avoid the splines curving in all sorts of cruel and unusual ways) and applying it as a spring system to get it to move a bit more realistically. I'm not going for photo-real here, just close enough to make it look good.
Once I finish up some of the more gruesome details, I'll render a quick image and post here so y'all can see what I'm doing. This is my very first A:M project, so don't expect anything breathtaking. I just need a means to tell a story, and A:M seems to be the best medium for such a task.