I haven’t experimented a ton with different types of non-paper finishes, but it is important to note that whites don’t always translate well to metallic paper or metal finishes… so they may not be the right choice for a winter scene. The whites sometimes look duller or more grayish. Vibrant colors can look quite nice on metallic/metal, and I’ve had good results with blacks interspersed with orange, blue and yellow (an urban night scene). This is probably a good time to note that metallic paper is quite delicate. You should not only be careful handling it, but be sure the lab hasn’t damaged it. Creases and fingerprints don’t come out, and I’ve had to order reprints of a lot of metallic paper prints over the years due to slip-ups at the lab.
I agree that canvas isn’t great for finer detail images. On the other hand, it can be a nice option for images where textures play an important role. Same thing with something like a Velvet or Torchon paper, where the texture of the paper may effectively echo textures in the photo.