Pattern Blocks 2

Following on from my thoughts yesterday I looked closer at one of the tilings (below right). During the playing I had heard someone say it wasn't that interesting as it was really just a fancy hexagonal tiling. I wondered whether there was a more interesting tiling with the same pieces and had a play on an online simulator

Here is the original tiling and a new tiling I made with the same pieces. 
What do you notice? What do you wonder? 

Which is the repeating part here? 
If you tiled the plane with each of these what fraction of each tiling would be yellow?

PS. Although I used a simulator here I actually much preferred using the real tiles so I think I may have to buy myself a set!