The best thing I can see about these pics is your use of perspective and a feeling of distance. Not many people have the patience to do that in pivot.
However, my #1 piece of advice to you is make your own sticks, and use a greater variety of them. Your 2 most-used sticks, the hovership and the explosion, are both from Droidz. They are both repeated many times- flipped, resized, recolored, but that can't disguise the fact that it's all the same stick. It makes the pictures look, frankly, boring and repetitive.
You desperately need a bit of variety. Take the time to make your own sticks, lots of them (you will get better with practice) and add bg's into your pics. You will see that it is well worth the extra time and effort.
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I wons an AOTW! (Slow motion.) I feel speshul :3
ALL YOUR BASE ARE BELONG TO CHUCK NORRIS.
bECAUSE EVERYTHING BELONGS TO CHUCK NORRIS, MMKAY?