For the composition, have a look at the attached link - Wally Wood's famous "22 panels that always work". That said, I think you're going great with this. The poses are good and have a sense of movement which is often lacking in Poser. The wall tiling in the final panel is definitely distracting, perhaps you can fade the texture somewhat to just give the impression of metallic pattern. The character's face and body are interesting, a nice change to total cheesecake. Actually thinking about it, she kind of looks like my sister-in-law...

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"you are terrifying
and strange and beautiful
something not everyone knows how to love." - Warsan Shire