I'm seriously considering switching to Android as my next phone, too. My iPhone is beginning to irritate me. I have to press the home button twice before I can enter my PIN, I have only one button (a back button and the other button to switch between apps or kill them would be nice), and there is no light like I see on Android phones indicating that a message arrived and needs answering, etc. These are all things that Apple just doesn't have, and their sandbox is just becoming more of a hindrance.
Like you say, if you're a moron who installs every spammy app you find, then tough luck for you, but I would have a much better experience with Android than I do with my locked-down sandboxed walled garden that is lacking some useful features because Apple knows best. Sorry, but they don't know best, and I'm getting sick of it. I'll still use my MacBook Pro as my desktop OS at home, but as far as a phone goes, iPhone isn't cutting it anymore, and Huawei are making some damned fast phones that look very attractive indeed (and are way cheaper).