Miguel Ángel Díaz, alias "Paolo" (? - 2011), not to be confused with the Spanish comic artist Miguel Ángel Díez, was a role-playing games magazine editor and setting creator. He was a pioneer in the popularization of role-playing games in his home country, Spain, as he also was in the publication of adventures, campaigns and modules.
An early member of the first Spanish role-playing games club in History, the club Auryn (founded 1986 by Luis d'Estrées), Díaz was a clue member among the editorial board in Auryn's official periodical publication, Troll, the first Spanish magazine to be fully dedicated to role-playing (also launched by d'Estrées in 1986).
Alongside with his friends Endika Garmendia and Ricard Ibáñez, two members of Auryn, Miguel Ángel Díaz was the co-designer of "The Darland's", a fantasy campaign setting for the Dungeons & Dragons basic set of rules (for the Darland's material see the Troll magazine issues 1, 4, 5, 6, and 7. Jordi Cabau had also created an adventure set in the Darland's, published in Troll #9).
Friendly called "Paolo" by his Auryn colleagues (although Paolo is an Italian name, not Spanish) Miguel Ángel Díaz died of leukaemia on 28 October 2011.