Emulator list management in VS
Not all developers care about all emulator images that are displayed in the VS list. An developer should have an option or tool to manage that list, and select which ones are displayed.
Ideally, this tool would show the developer all of the WP emulators on the machine (can be scoped to only those emulators in the standard directory; bonus points if able to add other directories for custom images) and allow the developer to select/check off those emulators that she wants shown int he 'device/emulator' drop-down box within Visual Studio.
Particularly as the number of optional device images that developers can download and install increase, this becomes a more critical need to keep the Windows Phone development workspace clean.
(related UV suggestion: http://wpdev.uservoice.com/suggestions/4328935 )
It would also be nice to be able to choose which emulator (or device) is selected by default for new projects/projects without a user settings file.
Another one added after developer conversations this week