She's a cute one alright ... lovely big, blue eyes!

You'll find that when you post several photos for critique in a single thread, you will likely not get indepth critique on all, if any, of the photos. Much better to only put one or two photos in to a thread at a time.

I like the expressions you have captured. I like that green background too.

You'll notice you've managed to isolate Tania from the background in shot 3 ... that's a good move ... the photo is about her ...the background should be complimentary only unless it's actually part of the story/ intent of the photo.

I think you can work on your crops a bit more. Cropping only a small part of anything usually isn't too effective. The top of her head, the elbow in the other shot ... just looks like you missed as opposed to being creative.

Lighting is another area you can look at more closely. In several of these her skin looks right on the verge of being too hot (over-exposed) but in the last two she is under-exposed.

I had a quick look through your links of her as well ... some nice ideas in there. Keep it up!