I only just begun the game really, but I noticed quite a big difference in the style of battle, menu, C-gear ect.
I like the neon colours against the black background in the menu and how they've changed the Pokéball when battling a little better. I have to say I love it compared to the original look in Pokémon Black. Not to mention the new Habitat List on the Pokédex, which I found really useful.
This is more of just a thread for fun, so have fun. Looking forward to your opinion. :P