I enjoy the Ljosalfar the most - to me, they're not the Forest pansies, tree-hugging, dance-around-in-a-circle-at-midnight LOTR Elves but hardened, pragmatic defenders of the forest. Take a look at Amelanchier's portrait and see my Elven ideal: a tough, indomitable Raider, quick with a bow or sword, deadly within the forests.
Imagine the sudden shock on an enemy's face when he sees a Elven archer rise like a phantom from the forest depths, his sharp arrows already striking home.
I like being able to build in forests, raise mega-cities, research Nature, Life and Air spells to not only bring lightning down on my foes, but also to resurrect fallen Heroes, revitalize deserts and plains, cast out blasted infernal terrain, and all the while expand the empire in the name of the forest.
Basically, I get to eat my cake and have it too: since I role-play, I can feel like I'm doing good while getting things my way.
(It's also a challenging civ to play as their units frankly are not all that "scary", so defeating zombies, spectres, demons, orcs is all the better)