My buddy just got the 928 on Verizon and I'm a little jealous. It's a little lighter and the screen has a much better picture. Hopefully, that's the one you get. The 822 is going to be quite a step down for you from an iPhone.
I'd disagree with this. I was using the 822 and upgraded to the 928. My wife uses an iPhone 4. I'd never have considered her phone better than mine. In fact I consider it subpar. The 822 and 928 are essentially the same experience, you just getting a slightly bigger screen, slightly better looking, and a better camera for night shots.
For me, it's the UI of WP that does it for me. I would take WP with zero apps over an iPhone with all of its apps. Not because the iPhone is a bad phone, quite the opposite. But the UI of WP pulled me in. I used iOS on a Touch for years, carrying a generic flip-phone. I had previously used Blackberries when my work paid for them, but when that ended and I was on my own, I was too cheap to pay for a data plan. I was also on Verizon when no iPhone existed there. I always thought when the iPhone came to Verizon I'd finally jump on board. But I didn't. I paid attention to early Android and considered jumping onboard the smartphone train with one of those. But they never appealed to me enough. Then I saw a WP7 commercial. That was it. The day Verizon got the Trophy I bought one. And I haven't looked back.
I get that there are apps that make the other devices appealing. I helped my mom upgrade to the iPhone because her credit card company that her small business uses had an app and a card reader. They didn't on WP (or Android, but I wouldn't have put her on Android).
Okay, this is the part where I have to drop the hammer. There is no such thing as an "essential" app. My recommendation to you would be this: Forget about the iPhone. Forget about iOS. Forget everything you know, or you think you know. Start fresh. Do not try to replicate your old smartphone existence. You are looking to switch because you feel bored, or constrained. Do not bring that baggage with you. It's like taking your new girlfriend or boyfriend to all of the same places you went with your ex, or watching the same movies and listening to the same albums that you and your ex discovered together. The whole point is to start anew.
This is the best advice I've seen on this site. And correct. You're getting a WP, not an iPhone. Forget the iPhone and everything it has.
My coworker got the S4 recently. She brags about an app that allows you to set different profiles based on your GPS, silence work email at home, set this to do that, etc. Okay, cool. Would I use it if I had an S4? Yeah, probably. But WP doesn't have it, so I don't use and I don't miss it. Because I like the Live Tiles better than that app's functionality.
On my iPod Touch I had a Redbox app, a Wells Fargo app, and a TV Guide app. I used them often and would enjoy it if WP had them. WP doesn't have them. Oh well. iOS has Battleheart, I loved that game. I'd love to play it again. WP doesn't have it. That's fine. I love Live Tiles and the UI and I'd miss that more switching to iOS than any iOS app I'd miss on WP.
And that's my personal preference and why I use WP.