Has to be the most underrated cuisine in the world. Outside of Russia (and of course Georgia), most people haven't tried Georgian food. But it is so damn good.
Anyway, for me:
--Indian (including separately: the traditional international North-Indian sort of selection, also south Indian, esp. Keralese and various other regional types)
--Lebanese (when it comes to pan-middle-Eastern dishes, the Lebanese do them best, as well as having their own specialties)
--Chinese (esp. Szechuan)
Certain dishes from other places: Mexican mole, Vietnamese lemongrass dishes, Tibetan momo, French breads and pastries, regional Italian specialties, esp. things involving artichokes and/or truffles.
a fan of Japanese, most Central European, most Korean, most Philipino. Doesn't mean that I can't generally find some things I like in these cuisines, but overall doesn't do it for me.