I play a mage, and I have to say I've been staring a whole lot at my character's own hands lately. The effects that swirl around your hands when you equip a spell are starting to get old for me, their effects proving very predictable and repetitive. Yet I can find no mods that even discuss the concept of editing the ambient animations of equipped spells. I understand that there is a mod that changes your 3rd person casting animations, but I'm a 1st person player and a lover of immersion. This may be much harder to do than I would think, and if so, I don't blame anyone, but I would be very happy to see a mod come out that could make the appearance of equipped spells in your hand more varied and detailed.
