I would also say that navigating the piles of garbage on the sidewalk is not fun, either.
Aside, NYC’s train system is, besides being filthy, unreliable, slow, poorly maintained, and a pain to switch between transit agencies, it’s also unfriendly to anyone who isn’t fully able bodied (the escalators and elevators are always broken and only present in a small fraction of stations), and neighborhoods are often designed in ways that lend places outside of the Manhattan core to be more dangerous and unpleasant than they have to be. Not to mention the usage of land in and around stations is very poorly used (the ~2 shops in Times Square station are a hilarious joke for what’s ostensibly the financial capital of the world), and any expansion of the system is prohibitively expensive for stupid political reasons.
But I suppose it’s still better than the transitless wasteland that is most of the USA.
Shibuya?
In Manhattan it's more like the constant blaring of horns and near-constant sirens of various types.