Observe the above image by D宅 on Pixiv if you will. The stunning landscape. The ridiculously gorgeous and vivid colours. Hatsune Miku!
Full size, the image is 2500x1154. My primary monitor is 1920x1200. To be pixel perfect (as I insist with my desktop backgrounds) it's too short by 46 pixels.
1920x1080 images are perverse enough, but this is just out and out cruel!
I don't worry too much about resolutions haha. As long as it isn't too blocky, I don't mind. But I know some people look for the perfect size, and I understand that - I mean, sometimes size does matter. :p