Japanese:
Octopus' Garden --> they have the freshest sashimi.... their Toro sooo delicious!!!
Yuji's: lots of interesting tapas and sushi. I loved their kiwi sushi!!
this place called Sushi World in 帝國廣場.. their Tokyo Roll's pretty good
French
Bishop's --> this is not exactly "hidden".. cuz it's pretty famous...
but I'd still love to mention this restaurant cuz their cuisine's just tooo delicious that it's a sin not to mention it... !!
Shanghai
白玉籃 in Richmond has the best 小籠包.. it's right beside 帝國廣場
omg I am so hungry now ><
八國布衣 's 小籠包was pretty good too.. but for some reason they're not open anymore

... 太可惜了
滬江... their food's really good.. altho I dunno if it's authentic or not
Desserts:
Ganache in Yaletown.... I luv their Caramel Chocolat....
Breakfast/Brunch/Tea
The Secret Garden on West Boulevard... so laid back.. "did time just stop for us?" hahaa!! i luv their apple pancake...!!
Hang-out places
Brioche in Yaletown... they have really yummy dishes at a very reasonable price
Alibi Room: I heard this one is good, and great atmosphere too, altho haven't try it myself yet. Gonna go after my finals ... ^__^