Top 5 in no particular order...
1. Browser: The EVO brings me the full browsing experience all while comfortably laying in my bed. Flash 10.1 really makes it easy to forget about my PC and do my web seraches on my phone.
2. Camera: Although not the best, I've taken some great pictures so far. The front facing camera comes in handy as well and takes some decent picture.
3. Screen: 4.3" makes the screen a beast, its clear and easy to see the detail in pictures and videos.
4. Speed: This phone is just a speed demon, from switching between screens and the on-screen keyboard, its nice to have a phone with virtually no lag (no lag in stock or rooted for me)
5. Apps: I love all the apps that I can load on my Evo, this really gives it longevity for not only the Evo but all android devices.