Or do ears get hard?
If ears are pinned with the traditional method, there can be hardening due to the scars produced by this method. The ears remain soft and natural if they are pinned with the new minimally invasive Merck stitch method because no scars are created with this method.
In general they don't change much in terms of feeling. Most surgeons use permanent sutures to recreate the folds or make them more pronounced. Even though theoretically the scar tissue will form after a few weeks and holds everything together, I would not recommend trying to flop your ears as this surgery has a rate of recurrence.