It's amusing how often the simple clue 'Greek god of war' shows up in crosswords, and almost always it's pointing to ARES. When I'm doing a weekday puzzle with a tight time limit, ARES is the four-letter lifeline I count on — short, clean, and crossing lots of common words. Constructors love it because it fits so neatly into grids, and solvers like me love it because it's usually unambiguous: A-R-E-S. Occasionally a puzzle will spice things up by cluing the Roman counterpart instead, so watch out for MARS if the clue says 'Roman war god' or just 'god of war' with no Greek specified.
I also enjoy the curveballs. Sometimes setters use epithets or less-familiar names: ENYALIUS (a Homeric epithet of Ares) or ENYO (a war goddess associated with Ares) can appear in more literary or themed puzzles. Cryptic crosswords play differently — you might see ARES hidden inside a phrase like "spAREly necessary" or clued via wordplay: a short anagram, a reversal, or even an &lit that both defines and hides the answer. And if the puzzle references pop culture, you might get a 'God of War' nod to the video game series, which can lead to names like Kratos showing up, though that's a different angle entirely.
For me the fun is recognizing the setter's mood: straightforward trivia, mythological deep cut, or playful pop-culture wink. Spotting ARES feels like a small victory; spotting a rarer ENYALIUS feels like you earned a gold star — keeps Sunday crosswords exciting, honestly.