Mounts: Make the more expensive ones benefit the user more
(Extra perks on the 150 and 340 mounts)
Also, make mounts dyable.
Pets: (They are mainly cosmetic, but make them provide the exp/gold/mat/item find bonus rates apply universally) – in that way people can actually choose their cosmetic pet as supposed to swapping them in need for the occasion of the type of mobs they are fighting.
