I often get strange looks when using my fingers to eat sushi, but it works so much better than chopsticks! I can usually convince whoever is eating with me to follow suit after their sushi crumbles into their soy sauce dish and creates the sad looking rice/soy soup.
The "nicer" sushi places I've been to in Japan (I.e sushi chef behind a desk giving you piece by piece) have been "eating with your hands is suggested, you have to specifically ask for chopsticks".
But the common more affordable places like revolving sushi or where it's part of a larger set meal, everyone just uses chopsticks.
This is going to sound incredibly hipster coming from a European, but something feels intensely satisfying about using chopsticks. As tools they're inferior to fork and knife in many ways, but something about leaving food items whole as prepared instead of penetrating them, or cutting them up, makes for a nice experience. It's a relaxing way to eat. Perhaps as a nod to Western cutlery I personally like Korea's flat metal chopsticks the best: http://i.imgur.com/Z1Lt2HPl.jpg or http://i.imgur.com/FUzNuoB.jpg
Similarily I like to eat sandwiches by cutting them up into pieces with a fork/knife. I don't think it's so much hipster though, seeing as "finger food" is quite common.
On those metal chopsticks though, I couldn't disagree more. Ever used them for noodles? It just doesn't grab stuff as well as the wooden ones.
