[eric12341]

-well the MS ecosystem for one (SkyDrive,Zune,office,Xbox live)
-I love the fact that in mango I can do alot of the things that android and iOS can do without having to launch an app.
-html5 hardware accelerated web browsing without need for a 3rd party browser and no mobile site redirects at all.
-it just works and I don't have to restart it unless im switching batteries
-battery life trouches android and has better battery management settings.
- u can control what u want running in the background without consequence (like Android).
-live tiles really give an idea of whats going on without having to launch an app and it makes the homescreen look alive rather than just a grid of icons in an app launcher fashion (android and iOS).