https://youtu.be/X9w96XkxG6IThe whole Virbank area is probably my favourite in the series. PokéStar Studios, the Virbank Complex, Roxie's underground band gym. They really captured that feeling well. First time you could get Elekid or Magby that early, too. I really wish we could get a game like BW2 again. The only things that really bother me about it is PokéStar Studios not being optional (despite the fact that I love it) and Join Avenue being dead now.
Unova (especially BW2) is the only region to do the city setting right. I can't believe it took 5 gens to finally get an explorable sewer system. You'd expect that to be in Kanto, at least. It's easy to just slap some buildings everywhere and call it a city, but I guess it takes a little more thought to flesh it out.