Wikipedia:
Typical flavors
In the US, the most popular forms of seasoned potato chips include "sour cream and onion", "barbecue", "ranch", and cheese-seasoned chips, including nacho flavor and cheddar (usually with sour cream).
Within North America, wider varieties are available in parts of Canada, where seasonings include dill pickle, ketchup, poutine and bacon. In Toronto and Vancouver, Lay's offers wasabi and curry chips.
The market in United Kingdom is dominated by Walkers which is known for its wide variety of crisps. Typical examples include salt & vinegar, cheese & onion, prawn cocktail, worcester sauce, beef & onion and smoky bacon, and more exotic seasonings such as Thai sweet chilli, Marmite and Branston Pickle. Most seasonings contain only vegetarian-friendly ingredients, although some recent seasonings such as lamb & mint sauce contain meat extracts.
Japan also has a vast range of seasonings; they include nori & salt, consommé, wasabi, soy sauce & butter, takoyaki, kimchi, garlic, chilli, scallop with butter, ume, mayonnaise, yakitori and ramen. Major manufacturers are Calbee, Koikeya and Yamayoshi.
In Hong Kong, the two prominent potato chips are the spicy "Ethnican" variety by Calbee, and barbecue by Jack'n Jill.
In mainland China, Lay's has introduced potato chips flavored in different Chinese cuisine, world cuisine, and even odd tastes like cucumber.
On the other hand, in Germany and Italy the vast majority of chips sold are seasoned with paprika.