I look more for the size than the shape. Size is VERY important, and after a while, you will know the exact size you want.
But in the end, yea, shape and size are the main things you should be looking at. All the yoyos you posted in the poll are a lot different from eachother. If you don’t care, I don’t see how you could struggle on your deciding. If you don’t care about what yoyo you want, you can actually just buy one.