So with the morrowind expansion we have the first collectible that changes a skill's looking which changes warden's bear's color. I think we should have more collectibles like this. It would be a good way for new achievements and making profit from crown store.
Here I'll suggest some skill visuals and ask you to suggest more under this post. ZOS might add them to the game in the future(or just ignores).

I have a stamina warden. His name is Beornil. I'll use bear ultimate, Selene set, bear mount, bear pet and bear costume which is collected from Wrothgar. You see almost everything is about bears. But my hardest hitting ability summons freaking shalks from ground which annoys me. I would like to see a skill visual for this ability which turns shalks into a bear which charges along the way with same effects.

Another skill that I hate to see is sorcerer's hurricane. Even if you wear a good looking armor or costume this skill ruins it which is a must have ability for stamina sorcerer. Imagine if we had skill visuals which changes this ability into daggers or skeleton hands rising from the ground randomly within the area the skill has.

Also changing roll dodging's look would be awesome. Visuals like sliding, short distance blinking, being carried by a cliff racer, soul swapping etc. would be some good visuals for roll dodging.

What are your skill visual suggestions, guys?