Partridge wyandotte bantams are easy. Just be sure to get birds that arent too light colored. Also watch for red showing up in the roosters breast. One of the big things to watch in wyandotte bantams is the tail. You dont want cochin tails. When viewed from behind it should look like a teepee with the main tail feathers being stiff and sticking out from under the tail coverts. Which reminds me, watch the tail color in the hens. Alot of breeders breed for patterned main tails which they are supposed to have solid black tail feathers except the top two feathers which are supposed to be black on the lower half with pencilled upper halfs (when looking at it from the side so one side of the quil is solid and other is pencilled). As with all rosecomb breeds watch the comb, be sure its not too big, the point is straight, the comb should follow the shape of the head, not stick out like hamburgs.
But the most important thing: Type first, color later!