Weremice. When the going gets tough, shrink down to the size of a twinkie, and scurry off through some inaccessible crack in the wall. Or crawl up their pant-leg and bite them on the willy. OoooOOOH!!! Now we're talkin' super powers...

Why can't we just Shapeshift or Polymorph in general?

It would be bad ass to be able to temporarily take the form of an Ice Troll.

There are Werelions. The term Ailuranthropy could be applied to describe their strain of the disease. The term Lycanthropy is used in the Elder Scrolls to describe all Werebeast because Werewolves are more widespread than the other Werebeast and it's use simplifies the subject, however incorrect the application of it's use. This much is said in the book "On Lycanthropy" found in-game. The term would not apply, in my opinion, to Khajiits because they don't transform into what they are. The beast races - Beast Men, Khajiit, are completely different than Werebeast - Man Beast, Werelions. I like to use the term Therianthropy to describe Werebeast as a whole group.

I want to be a Wereshark. No wait, a Werelandshark!