Not only can you mix in different fibres like cotton and wool strips ,as in photos here . . .but you can also get different widths of your fabrics depending on how they roll or fold up as you hook them!I love the messy textural look here!
This makes me think that one of the reasons rug hookers go for the more expensive  100% wool for their rugs, might be that one can get a very neat array of loops one after the other. . . . .which if this is the ''LOOK'' one likes then this is a good thing!

I feel it is better to hook a rug in a messy creative way than to NOT HOOK AT ALL! 
There is a place for every type of hooked piece . . .
but   . .. 
Just dont enter into a competition where technique and machine  look neatness is the end result!!
Some call these mixed media rugs  hooked ''RAG RUGS'' . . .
Best examples are Kaffe Fassett's rag rugs . .magnificent in colour and design and TOTALLY exciting to look at . . .although not everyones ''cup of tea'' neatness wise!!!

Here above is a hooked result of mixed media rug hooking . . .
from the trip to Guatemala!
ITs beautiful!Happy and colourful!
BRAVO!to my friend Ann who hooked it!
(Watch for a future posting of exciting end result!)