Jever is my all-time favourite.
In general I like all in germany as "Pilsener" referred beers the most. First come into mind are: Urquell, Staropramen, Lübzner, KöPi, Astra (I don't like the taste that much but its cult), Wernesgrüner, Flensburger, Breznak (Not sure this is a pilsener)...
Lagers I like too from time to time, especially with a hangover.
cheers!