First of all, thank you very much for taking the time to reply. I really appreciate it.

the sprite's body is quite quite nice, but i have to say the shape of the head is a complete letdown by comparisson. I think it needs a real redrawing with the same style and care of the lower parts.

I'm not really sure what is wrong with it, though - the shading? The animeish style? If there is a problem, I'd like to fix it, but I'm not sure what to fix. I will admit that I didn't worry a whole lot about the shading of the head, since most of it will be covered by hair anyway. Considering that, would it be better to post a version with hair? The sprite base itself is supposed to be bald so that I can draw different hairstyles onto it, but maybe it would be better to show it off with something on it, instead?
Also, you know this sprite is not isometric? Those tiles will look strange with him; far better for them to be *much* compressed vertically or his stance taken from a much higher angle.
Only two of the views (the second and the second-to-last) are supposed to be isometric. The game uses all eight directions for the sprites, so there are north, east/west, and south views as well. (I've only got five here, the middle three will be flipped.) Never mind, never mind, I get what you mean!

I know they're at more of a... I'm not sure of the term for it, but a view straight from the side, rather than an angle from above? I actually did it this way on purpose, partly because I like this view better but also because I have a hard time with a higher angle. You're probably right, though. Would an angle like this really be impossible to pull off? (Outside of a platformer, I mean.)
I'd like to try to improve the sprite at this angle for now. I might have to end up redrawing from a higher angle, but if I can get this one looking nice, if it won't fit in my game the way it is, perhaps I can use it in a more appropriate game later.

...Actually, now that I think of it, maybe I can work on two versions. I'll mess around with trying to get it into a higher-angle perspective, as well. I still want to be able to better understnad what's wrong with the head, though.

The tiles themselves, they are a bit noisy and feel like they're missing confidence in the texture. Id suggest working them in light and shadow like your character's body rather than form and noise.
I'm not sure I understand this one.

For the grass, I drew in where I thought there should be shadows, then put in some highlights (perhaps not in the most appropriate places. I can't say I've ever been very confident in the grass texture....) I didn't use any sort of noise filter or anything? (I might be unclear on the way you're using "noisy"... if so, then I apologize if I'm not making sense, haha.) The stoney texture, too, I made by drawing the texture and then applying highlights and shadows. It isn't random. (Or, it's not supposed to be, I guess. It wasn't my intention to make it noisy.)
I'll admit, I just don't know how to make the grass look the way I want it. The only types of grass that I can seem to find much advice on are straight well-manicured-lawn-looking grass, and the strange big leafy stuff that looks like it belongs in a jungle.

I'll try again.
I kind of feel like I sound like I've taken all your critique and just said stuff like, "Well yes but that's the way it's supposed to be!

" ...

I don't mean to. I'll take your advice and keep working on it. Thanks again for taking the time to critique, I really appreciate it.