Oh gods, I really love Shalour City and Coumarine City!
First of all, it's mainly because of their respective music. Shalor City gave off this chinese-japanese lore off their music, as they focused on their mega-evolution ideology! It's also pretty well shaped, in my opinion, because it had it's 'core' as a city with buildings and all, but there's also a cool beach nearby, that's nearby the tower, which was pretty interesting! I dunno, all in all, everything about Shalor City fit very well for me, and it was pretty exciting to explore. <33
Ah, and Coumarine City's music was calm and fit towards their port theme! Like how the citiy was near the ocean, and how they had different boats and all! Plus I do like how it had two 'levels' of the city - I don't think we really had that before, and it was quite interesting to see. :3