Jupiter is known to expand everything he touches, including your options, so this year, you may be tempted to spread yourself too thin by running in too many directions.
The Yahoo help post offers options for disgruntled users, including how to download your content and access it through another client and how to delete your account.
There are a few cosmetic options as well, including the ability to slim down your main menu by removing items you don't use -- sounds trivial, but this is something, believe it or not, that isn't easily done in Media Center.
You can choose to customize as little or as much of your instances as you would like, including customizing the hardware, OS, disk, and other configuration options.