List of High-Quality WP Apps...
Here's a list of all my favorite and most used apps (I know there's some missing, like 4square, but I don't use that service or any of the ones that you may think I skip):
Amazing Weather HD
Nokia Music instead of Xbox Music
GroupMe (much improved recently)
Twitter (actually prefer 1st party app, here)
Battery (first one when you search "battery")
Wikipedia (awesome, makes wiki fun)
Stop the Music!
App Social (REALLY helps find good apps)
HERE City Lens
Hey DJ! (uses voice control for your music, great)
Tell me what I missed!