Audiocloud, BEEM, TuneIn Radio, Pandora and Mp3 Finder will cover all your music needs. Listening, saving, you name it.
Netflix & Crackle are great for movies on this gorgeous 720p HD screen, but they come nowhere close to comparing to Flash Videos where you can stream, download & even transfer (to pc) movies or tv. Watched The Hangover 3 last night. 8)
Speaking on file transfers, GetThemAll is a MUST have. You can pull exe's, zip's, music, videos, pretty much whatever, and upload to your PC. AWESOME!!!
For misc/utility apps, Flashlight-X is much better IMO, than HTC's. Speedtest.net is great. Amazing Weather HD. Battery Sense run great with Live Tiles and lock screen support. Don't forget Sticky Notes or Indeed if you need/want a job.
Best camera app/lens, I think, is Pro Shot. Really pumps it up. Blink & Photosynth are great at what they do too.
Games are all you.
Hope this helps. This is all the stuff that has made my 8X the most Pimped Out, Bad A$$, piece of handheld technology I've, or anyone I've shown it to, has ever seen..
Welcome bro. Enjoy!!!!