For me it would be how well the speaker works (my first 2 phones had crappy speakers when it came to calling someone) and whether it has a full qwerty keyboard.
My phone has no keyboard what so ever, touchscreen works perfectly fine. I've got a slightly older android lying around with a full querty keyboard that might have been a bit quicker with texting but eh this phone is way better than that one, and I would still need to unlock that phone from verizon 😛.