My best advice for WP8... give it an honest chance. I went back and forth a bit, now with the 1520. A couple weeks should be enough for you to figure out if it's the right OS for you.
For now at least, until 8.1, anything you don't want to miss out on, pin to your start screen. Notifications in WP8 are weird. If you don't have that app pinned, and if you don't see the toast as it's happening, you'll likely miss the notification.
Many popular apps have showed up recently or are on their way. The development has really begun to kick in for WP8 recently. Other apps that aren't available often have a 3rd party option. Some of the 3rd party stuff is actually great.
Most of Nokia's own apps are awesome and free.
Some of my favorite apps- Lockmix, Readit (reddit), Messenger, (facebook messenger), Amazing Weather HD, Breaking News, Camera 360, CycloMeter, Evernote, Mehdoh (twitter), Metrotube (youtube), Pandora.