Are your concerns with Android phones or tablets?
Android in general. I got the Nexus 7 as I think iOS is stupidly limited on a tablet. I like it as a phone OS, but on a tablet it just seems underpowered. Turns out one of the reasons as to why I don't like iOS on a tablet, i.e. some iPad apps feel like underpowered, blown up iPhone apps (some definitely don't, and make good use of the additional processing power and screen size, it's a mixed bag), affects Android even more than it does iOS. Most of the apps I ran on the N7 were designed for a phone and were simply blown up to fit the larger screen, which worked in a few cases, but in others left an awkward looking mess with stretched assets, some parts of the app piling up on the left side of the screen and wonky looking pictures, which were obviously meant for a smaller screen, but were being stretched to fit the N7 screen. At least those apps tried, some just crammed everything into the upper left hand corner, or the very middle of the screen, and didn't even try to fit the screen.
As it is, even though I'm not a fan of iPads, I'd still rather have one over an Android tablet.
I found Android to be, overall, very, very disappointing. The N7 has a persistent lag which pervades everything you do on it. Scrolling is always jerky- in the browser, swiping between home screens, scrolling through lists etc. And that's in the better apps, the problem is even worse (for the most part) when it's an app that's been coded to cover the widest Android base possible, i.e. an app designed for 2.1+, or 2.2+. Those apps are just
terrible, the lag and choppiness is abominable, even running in 4.2.
And for those who live in, or have interests in, a smaller market, Android is, the majority of the time, very poor in terms of app selection. I know I've missed a stack of apps for Australian sport, Australian tv, surfing and so on. Those apps that do exist are often really bad ports of the iPhone versions, which target the widest device base the developers possibly can, and are then very rarely optimised for newer devices or newer Android versions.
After that disappointment, I abandoned my plans to get a Galaxy S3 or what's now known as the Nexus 4 and got an iPhone 5. I'm also getting a Windows 8 Pro tablet when a few more are released here next year. All the powerful desktop software in the (Windows) world, plus Windows 8 touchscreen apps (whose numbers are quickly growing), plus having all the great iOS apps (which cover my interests) and great performance on the iPhone will offer me far more than Android can.
Quit talking about user experience when you've never used one.
I have, and I agree, it blows. You have apps using different design languages, resulting in a visual mishmash. There's a stack of apps out there still using Froyo/Gingerbread assets, with only some using Holo. And then you have apps which throw everything out the window and use a completely different design language and different assets to the rest of the OS and other Android apps. There's very little consistency. Then, for example, you have apps which use the menu button to good effect and others which stick all their menu options onscreen, which is another point of inconsistency in itself, as some developers like to put these options at the top of the screen, while others place them at the bottom, ala most apps in iOS.
It's just a mess. It might (key word, might) clean up in a few years once developers stop catering for 2.X devices and 4.X becomes the new bottom, base level for development, but by then 5.X or 6.X will probably have been released with a set of changes to the UI, leaving Android in the same predicament it's in now. That's as long as Google's learnt their lesson and whether they can enforce a level of consistency amongst developers. Even then, it's entirely possible that 2.X will continue to live on in prepaid devices, meaning this problem could continue to persist for a while still.