N78 keypad is anyday better than N82's keypad. The N78 keypad only looks awkward but is not that difficult to use.
From what I read everywhere, N82's keypad is just a matter of getting used to it. But there is a difference between a keypad being good ... and getting used to a bad keypad. There would be very few who would actually prefer the N82 keypad to other keypads. For the majority who say N82 keypad is not bad, its more of a case of "getting used to a bad keypad"
This point was best illustrated by my friend who said he had got perfectly used to his N82 keypad but whenever he gets to use his brother's Nokia 5700, it feels like heaven and its only then that he realises what he is missing.