I guess it'd be ok to share my thoughts on the 5. I went through a brief breakup during the 4S where I spent time with the Galaxy Nexus, HTC Rezound, and Galaxy S3. I have had the iphone 5 since the day of release. Of course these pros and cons relate to me only, not meant to signify anyone else's experience.
Hardware (Pros)
- I think the screen brightness and accuracy of whites is 2nd to none. This was one of the main reasons I could not stay with the S3. I found it too dim and the whites to be almost grey.
- The accuracy of colors on the screen, as well as sharpness, are also 2nd to none (reviews have it better than the HTC DNA screen). Again, another reason I left the S3. The sharpness was not comparable despite the 306ppi and the colors were almost cartoonish. Very flourescent. The Note II corrected on this going RGB vs Pentile and offering the 4 screen mode presets, but still no comparison to the iphone 5.
- The camera is the best of the phone cameras I tried in terms of picture quality. The S3 has more features, but at the end of the day it is the quality of the photo that matters to me. Video and still photo both excel on the iphone 5.
- The speaker on the iphone 5 is the loudest of the phones I used.
- Pocketability. Pretty self expalatory.
Hardware (Cons)
- For me, the size of the S3 screen is perfect. I am 6'7 so the additional size didn't compromise anything for me. I find the 5 to be a bit narrow and small. I spend more time on my phone then most I know, and I don't mess with tablets, so a larger screen would have been welcomed by me. But, this won't be the case for many generations to come.
- This is the shocker, and one I would never have expected. I found the android phones I used to get better data signal overall. I was able to hold on to 3G in areas the 5 (and 4S) would drop to 1x.
Software/OS (Pros)
- I find the selection of apps to be better on the iphone and IOS. The numbers really don't mean anything when any kid can throw together a junk app and get it approved. I find more quality, useable apps to either hit IOS first, or become exclusive to IOS.
- Simplicity can be valued. IOS is certainly simple, fast, efficient and designed to be a marriage with the iphone. I can value that.
- I experience zero lag, period. I cannot say the same with the android devices I have used though I have heard JB makes a big improvement on this.
- Backing up is simple. Not quite as simple on an unrooted android phone when you are talking about apps, texts, photos, settings, etc.
Software/OS (Cons) - This is where I start to lean android....
- I hate, HATE that I cannot move pics (actually move, not simply copy) between albums, or move pics from my camera roll to existing albums or new albums. Frustrates the hell out of me to be honest. I do a lot with pictures, downloads, screenshots, etc and in order to get any organization what-so-ever I have to connect to the computer and do it there. In my opinion Android's gallery features blow iphone's away.
- Customization would be nice. Sure a live wallpaper of pine trees and snow seems silly to some, but I liked having the option if I wanted it. I liked being able to put an app icon where I desired, a widget if I wanted to use one, switch a keyboard if I prefer a different one, have pop-up text reply straight out of the box, etc.
- I like that everything from facebook to SMS, etc is built in through everything on android. If I want to upload a video to facebook from the gallery, boom...done. If I want to text a link to a buddy from a website...done. With IOS I have to constantly seek workarounds.
- Sure, many on here will light you up if you mention flash cause "flash is dead". Listen, as long as websites I occasionally visit still require flash, then flash is not dead yet. It happens, and it is annoying.
Thats enough. I already wrote an essay that many probably skipped over or quit reading before finishing

I love my iphone 5, but to be honest, I wanted the S3 to work. I craved the larger screen and welcomed many of the things android allows me to do that IOS simply does not. But, until they can put out a phone with a quality screen (amoled, to me, sucks and is too dim) I cannot make the switch. HTC was close with the DNA until they mindlessly decided 11GB or useable onstore memory is enough for the average user. I'm not the average user.
Thanks for letting me share!!