I've changed my skin to the regular holidays version. We also have our Christmas decorations up outside, but have yet to get our tree and decorate the inside.
It's the colors/themes that you see on these boards. You have options to change them, if you like. Just go to User CP, on the left choose Edit Options, go to the very bottom of the page and you will see a drop down menu for Forum Skins. Some of the forums have their own themes which will override yours, but some will show your chosen color scheme.
It's not going to change. Forums that have a sponsor or set theme won't change from that set theme. For example, Theme Parks will always be Tour Guide Mike, Resorts will always be Swan/Dolphin, and this forum will always be the Unplugged skin.
It's not going to change. Forums that have a sponsor or set theme won't change from that set theme. For example, Theme Parks will always be Tour Guide Mike, Resorts will always be Swan/Dolphin, and this forum will always be the Unplugged skin.