What are some popular imperial beer styles and how do they differ from other types of beer?

Popular imperial beer styles include imperial stout, imperial IPA, and imperial pilsner. These styles are characterized by higher alcohol content and more intense flavors compared to regular versions of the same style. Imperial beers often have a richer and more complex taste profile, with a stronger hop presence in the case of IPAs and a more robust malt character in stouts and pilsners.