I guess it depends on who you are handing the reins over to... Got a protegé? An understudy? Do you want him (or her) to continue to like you?

You might want to drop a combination of good and bad (just to be fair).

But if you are leaving the AD's to their own devices, drop the ones YOU hate the most, no matter the money or convenience (if you hate them, the money and convenience didn't matter, anyway).