Apps that I firmly believe will pull people to Win8 but aren't available, are
Google+ (same one as what's on IOS)
Pinterest
Instagram
StumbleUpon
Pulse (I see it on the market, but it won't install on any of the WP's I've had. Lumia 900, HTC Surround, nor 8X)
Flipboard
feedly
News Republic(this is on the market, but it's a TERRIBLE excuse for an app. The Android/IOS app are far better)
YouTube
Amazon MP3
Pandora
Pocket(aka Read-It Later)
I would consider these to be "top" apps, yet Microsoft doesn't think so.. apparently they have 46 of the top 50 apps, yet I just listed 12 that are no where to be found..
I want to see those apps designed by the actual developer. Windows Phone has tons of app clones that do nothing but hurt the phone's image because the clones are simply not as good as the actual apps.
They also need to start getting rid of all the sex apps. If I'm browsing News, why am I seeing Kama Sutra apps?? wtf?