#1 FC St. Pauli (Rivals - Hamburg)
A derby definitely defined by its politics, St Pauli have earned an infamous reputation since the 1980's as being a counterculture club. Their ground is situated in Hamburg's Reeperbahn area, its red-light district, and their fans are rowdy, vocal and very left-leaning.
These fans have never had a winning team to watch though, with St. Pauli spending their history bouncing between the Bundesliga and the lower leagues.
Hamburg, in contrast, have never spent any time outside the top division, winning 6 Bundesliga titles so far. As a result, the derby hasn't been contested as much as others, with both teams operating in different spheres.
St. Pauli has a far stronger identity, an impressively progressive club who support their team in massive numbers even when they occupy the 2. Bundesliga, as compared to Hamburg, who have just defined themselves by their success on the pitch, and little else.