There's an absolute plethora of keyboard options available for Android devices - in today's poll, phones in particular. You can use the Android (AOSP) keyboard, the stock manufacturer keyboard that ships on your phone, or one of the hundreds of third-party options available in the Play Store. And if you go third-party, there are all different styles, from quirky options like 8Pen, to trace-based keyboards like Swype, and traditional predictive tap-based choices such as SwiftKey.
So, what do you use on your phone? Manufacturer, Android, or third-party keyboard?
(A few notes, since I know these questions will crop up: if you're running a Nexus device, you're using Android. If you're running an AOSP-based ROM, you're using Android. If you're running a custom ROM based on a manufacturer skin, you're probably using manufacturer. If you're not sure what you're using, it's probably manufacturer. If you're using a themed keyboard, choose the option it's based on. In other words, use common sense when choosing.)