During rush hour, some Japanese sleep while standing. They lean against each other and fucking fall asleep. It's unreal. Like you, I do not need a seat, but I do not need to feel like a Sardine either. I'll likely not ride a train in India anytime soon.
Wow. That's just insane.
And Indian trains look absolutely nuts. I'd love to go on the Darjeeling Himalayan Railway, though. Any train that's made a World Heritage Site has got to be good.