Werewolves..... yeah they are cool but overused. I was actually surprised when playing Dragonborn when I was charging in to kill 3 Nords and out of nowhere they changed into Werebears.

According to lore there are other were-creatures. Werebears (as mentioned, can be found in Solstheim and also in Skyrim), Wereboars which appeared in the 2nd game (are located exclusively in High Rock), Werevultures (are reportedly rare in Valenwood), Werelions (can be found in the jungles of Elsweyr) and Werecrocodiles (are known to lurk in isolated swamps of Black Marsh).

Almost forgot Weresharks which are said to roam the seas, according to M'aiq the Liar.

Hopefully more Were-creatures will be added later on and with it the ability to become them. Might even make them into a race only thing, like Wereboars (Bretons), Werebears (Nords), Werelions (Khajiit), Werecrocodiles (Argonians) Werevultures (Wood Elves) and some new Were-creature can be made for the High Elves, Dark Elves and Imperials.