The absolute zenith of mobile keyboards was the Blackberry, which included F & J nubs. I could type without looking at my phone at full speed and not get a character wrong.

The fact that Apple will as often as not autocorrect grammar from actually-correct to wrong -- and systematically screw up spelling -- in not just transcribed Siri but also in typing is just inexcusable at this point. It will even Randomly capitalize Certain words!

Nokia E61 perfectly aped the blackberry form factor and also had a great keyboard (with f & j nubs). I still fondly remember mine.