If you're looking for something different, and I mean DIFFERENT, give a Korean resturant a try. This is the best that I've personally been to in Manhattan. The decor is nice but you might get a bit of an attitude if you're not Korean yourself. I usually go with my Korean friends, so I normally don't have a problem!
For first timers, I'd recommend the Be Bim Bop, which is basically rice, vegetables, hot sauce, and a boiled egg that you mix yourself to your liking. Be aware that most Korean dishes are spicy-hot! Also, try the Galbi steak, which is cooked right in front of you. There are barbeque pits in each table, and again you cook it to your liking. Once cooked, you take it out, place it on a long lettuce leaf with rice (Or Be Bim Bop if you ordered it), and enjoy. Another "safe" bet is the Jae-Ga (not sure of the spelling), which is a Korean stew, usually served in an iron-kettle like soup bowl with a sterno underneath to keep it warm and cooking.