PS 2015: Printing dialog window opens always in standard size. If you enlarge the window, it opens again in standard size in the next printing process. If you have a big printing volume it really could bother because it is too small! I think this wasn't in older versions.
Before CC I opened a print dialog box in Photoshop and it remembered its position and size. It's a big (long) dialog box with many option to choose, that's why it's so important. Unfortunatelty, in Photoshop CC it always opens minimized. I have to scroll it or stretch it every time.