OP, about this time last year, I was thinking just like you. I was having problems with my 3G, it wouldn’t sync, Apple could not diagnose the problem (turned out it was my PC) and I had pretty much had it with Apple. Then the 4S was released. Like a lot of other iPhone users, I was disappointed it was not a 5.
I had started reading Samsung Galaxy S2 reviews, watching Galaxy S2 v Ip4S reviews on youtube, and I was convinced I was going to get a Galaxy S2, because everyone was raving about the S2. It had a bigger screen, apparently was quicker, you could customise your interface with widgets and more importantly, for me anyway, it had flash, so you could download and save videos directly to your device.
As soon as my contract ended, in December 2011, I went straight to my carrier and ordered over the counter a Galaxy S2. Took it home, charged it up, first thing I did when I turned it on was put in my contacts, important calendar dates, etc. Once I started to play with it and start figuring it out, it hit me that Android is not ios. It was the little things I noticed, eg on an iPhone, you read something online, you get to the bottom, you touch the top of the screen and it takes you back to the top. No such thing with an Android. With an iPhone, you can skip from one web page to another with two clicks of your thumb, an S2 requires 5 or 6 clicks to go from page to page.
Then I started looking for apps, there was like 5 or 6 stores you could go to? Which one do you use? Where do you buy music from? I tested the flash, some movies downloaded, some didn’t. Why was that? Still don’t know. Even with pics, some saved, some didn’t, again, don’t know why. Confusion confusion confusion. It was about this point I started to regret getting a Samsung. But I continued to persevere. I start playing with the widgets and customising. Now this I admit was totally cool. You can put a clock face as your permanent screen, put whatever you like there, and as many as you like to a point. I put a weather widget on my home screen, set it to my local city (Melbourne, Australia) but for some reason it kept changing to some small town in the USA. Don’t know why. As many times as I changed it back to Melbourne, it kept going back to this small town.
So I go back to check my contacts and calendar, and to my horror, discover that every friend on my Facebook is in my contacts. And double horror, every Facebook friends’ birthday was in my calendar. I didn’t want that, I didn’t ask for that. That was the straw that broke the camel’s back. After 3 days of using the Galaxy S2, I did not want it anymore. The feelings of regret had reached a point where I had made up my mind. I wanted an iPhone again. It was now or never. Either take it back after 3 days or be stuck with it for 2 years. With the Galaxy, sometimes movies and pics would download, sometimes they wouldn’t. Trying to figure out where to buy apps from was confusing, you need all these different accounts for each market you buy from, 300 birthdays on my calendar and 300 names on my contact list was annoying, especially as I took the time to enter the contacts and dates that I wanted, and it just goes and exports everything from Facebook without even asking me.
So I went back to the carrier and begged them for a new 4S, like I said now or never. After a lot of grovelling and begging, they agreed to swap the Galaxy for a new 64G black 4S. I had to wait though, 3 weeks, but it was worth it. And I couldn’t be happier. Got a new pc, syncs beautifully. I love it (4S), best phone I’ve ever had, and that includes the Samsung Galaxy S2. Love it so much I’m going to bypass the i5 and just wait for the version which comes out after that. It might not have the widgets and flash of Samsung/Android, but now I know what they mean by user experience. Everything just works. If I want an app, I know where to go. Now with the notification centre, it makes things a lot easier so having widgets is not the be all and end all.
My point is, if you want to ditch Apple, no one is stopping you, I would even recommend it just so you can get perspective, but be prepared for change and things different to what you are accustomed to. From my experience, it's like moving from one country to another, the changes are big, For you, that change could be for better or worse. But you’ll never know until you try it.
As for me, I will never leave Apple again. Admittedley, I have noticed a few bugs with ios6, the main one being that the touch screen buttons feel hard when you press them, eg you press the camera screen button and it doesn’t register immediately. But Apple will eventually fix these bugs. If you had Android, you could be waiting a while for an update, if at all. But like I said, you'll never know until you try.