From Windows Phone 7.5 to Android

So i had a Nokia Lumia 800 for the last 2 years and now that my contract is ending and i am going to switch to a Samsung Galaxy S4. I wanted to know what apps and features i have been missing out on.

I am a social media and music head. But i also like to make allot of pictures and keep up with tech news. So any suggestions?

Kind regards!