Like I said before, my appreciation for Ouja is more because of what he brings to the story than the character all on his own (although that's pretty awesome too), but the role he can fill as a toy is just...AHHH! So awesome. There are so many great ways to pose him and play him off other figures.
Think I'm holding out for Figuarts Knight Survive, still, and then that'll be it for Ryuki. Hopefully I won't be too overwhelmed by the awesomeness of future figuarts, since I feel like there are lots of characters in Ryuki I could be pushed over the edge with. Lots of Kamen Rider characters in general I could be pushed over the edge with, really! Don't know how I'm going to talk myself out of buying Psyga whenever he comes out.
Knight and Ouja will be a whole lot of fun just to play off each other! Think the only other two Ryuki combos that would be as fun are Knight and Ryuki and Ouja and Zolda.