Wow, so far, these maps look sweet!

Although, being me, I has but a few nitpicks ...
AFTS01:
first shot: Looks good, guess. However, the lighting looks odd to me, dunno why...
second shot: That architecture looks kinda "blocky"... well, i mean, the vertex count is fine, it's just that "sharp, protruding edges" of walls are apperantly bad (or so i have been told). Also, the level of detail in that shot looks to be on the bland side. And making stairs that have that grass flat for the floor, and that "green marble with vines" texture for the lower, just doesn't seem to make sense to me ...
shot 3: Erm ... excuse me, is that a SEAM where those two liquids meet?

Unless they're oil and water, then it looks sorta odd. Although tellya the truth, you could probably just make the seamline "wavey" (i'd recommend DB's curve tool, if you do chose to do it) and probably get away with it (sorta like TeamTNT did with the nukage and water in "Habitat"). Everything else in the screen actually looks good.
shot 4: Don't quite know what to say about this one. I'll give you the benefit of a doubt and just assume nothing's wrong with it. =P
AFTS02:
all shots: Beautiful. Nice lighting, smart use of textures, a pleasing amount of detailing. Great work, keep it up. ;D
AFTS03:
I love the color scheme you have here (dark green and black/grey). Yet, avoid overusing that E1 brick texture, and also try not to just use that E1 metal tile flat EVERYWHERE (even though it works just about ANYWHERE, imo ;P). Other than that, great work. Lovin' the height variation, as well as the crates.
AFTS04:
Please tell me i'm not the only one who thought "AV!" immediately after seeing those screens.

Anyways. Those textures seem to work really well together ... perhaps thats why they seem to be used together often in COUNTLESS maps. ;P
Lighting's good here too. Perhaps try making it more gradient, though, instead of just the "solid chunks of light" thing that you see in most 1995 wads. If you really wanna see some examples of BEAUTIFUL gradient lighting, just take a look at any of Ola's work.
AFTS05:
Doesn't look like enough is done yet for me to really make a judgement. ;P
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So yeah, this project looks to be off to a pimpin' start, and i eagerly await the moment when i get to play it. =D