Well, where to start with this MOC? It is truly a gorgeous creation and I congratulate you for it! I've always wondered what a good design for a Turaga would be, and this is it!
So, first of all, let's look at the parts used and how they were used; with a mixture of Bionicle, Technic and LEGO parts, this is a very nicely designed creation as far as that goes, and a very intriguing one.
The originality is hard for me to speak of since I don't normally look up Turaga MOCs in favour of Toa and Makuta. This also doesn't include your other MOCs, though since they're YOURS then I wouldn't count it against you. However, I've never seen an MOC quite like this one before so I give it full marks for originality.
The technique used to create this is very clever, especially the use of Minifigure legs as 'fingers', which gives the MOC a very 'movie-form' look that I absolutely ADORE! Other parts of the technique are a mystery to me, so I'm curious as to how to build a Turaga like this one.
So, to conclude, this is a great design that I think is absolutely fantastic and very pose-able. I rate it very highly in the designs that I have seen (along with many of your other works which I checked out while writing this) and wish to congratulate you one being able to make something so great. Personally, I'd love to ask for some basic instructions on how to make a basic 'frame' of this model.
Thanks for the Critique. Tipuna was my second attempt at small bionicle figure building. I've seen some turaga before, but they're mostly revamps. I've only seen a few original Turagas, so it felt like the thing to do, especially since I needed a driver and passenger for the Reta-Sarka.