The philosophies are totally different. An iPhone just is. You use it as you get it unless you buy a few apps.
An Android phone, almost any Android phone, is the beginning - you can modify it, add loads of free apps, etc.
If you don't want to be bothered about learning about Android, stick to an iPhone. If you get an Android phone, the first thing you have to do, before you get rid of your iPhone, is disconnect the iPhone from iMessages. (Otherwise everyone with an iPhone who sends you an iMessage will be sending it into Neverland.) Then you'll probably have to tell all of them to send you one message marked as SMS once you get the Android phone.
And that's the beginning.