1.) Art Style: Valkyria Chronicles takes the moving painting style of Okami to the next level. Games are tend to have too similar of an art direction currently and a game like VC is a breath of fresh air. The gritty look of games like Gears of War, Resistance, Call of Duty, etc. is way too over done.
2.) Story: War is often the back drop of RPGs and video games in general but rarely is it presented like in VC. The characters of VC aren't professional soldiers. They are average everyday people taking up arms to defend their homeland. Sure there are some veterans in your squad but you mostly see the story through the fresh eyes of Welkin, Alicia, and Isara.
3.)Character Development: Even the "generic" units of VC have their own stories. Via the personnel tab, as well as their potentials, you get a deeper insight into each units personality. The optional story pages/battles also do a great job of endearing you too your central characters Welkin, Isara, Alicia, Rosie, Largo, etc.
4.)Gameplay: The combination of real time and turnbased elements come together exceptionally well. It forces you to plan your movements a head of time like in other strategy RPGS but once you start to move your unit it becomes real time and you have to be conscious of your environment or you'll fall prey to enemy cover fire. Your current battlefield lacks cover? Use the Edelweiss as rolling cover. Also, as your soldier classes and individual units gain potentials, you are rewarded for taking the time to get know your characters. If one scout has a pollen allergy you don't take them to a grassy battlefield etc.