When I began creating graphics, I usually made sigs in this order.
2 abstract
1 grunge
1 tech
I learned a bit from each, such as placement of 3d abstract renders (from the abstract sigs I created). Good brushing (from the grunge technique). From the tech I didn't learn much except pattern placements, which can improve a sig greatly. Then create a unique sig or two adding all the stuff you learned. Then start over again with the abstract, etc. This will help you improve in each catagory and improve your overall unique technique. After you get pretty experienced in the abstract, grunge, and tech style, you can move on to some more advanced stuff such as blur sigs, retro, smudge, etc.
Hope this helps you some, I enjoy most of your work already, I'm just trying to tip ya on how to get even better

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