I think that's the gist: anything goes, and maybe start with 3 of anything!
...based on genre (Comedy): Tampopo (1985), Matchstick Men (2003), Force Majeure (2014)
...based on subgenre (Heist): The Killing (1956), Thief (1981), Sexy Beast (2001)
...based on director (Kelly Reichardt): Old Joy (2006), First Cow (2019), Showing Up (2022)
...based on production studio (Studio Ghibli): Only Yesterday (1991), Porco Rosso (1992), The Wind Rises (2013)
...based on location (Vienna, AT): The Third Man (1949), Bad Timing (1980), Before Sunrise (1995)
...based on interest (Desires): Deep End (1970), Exotica (1994), Ghost World (2001)
...based on language (French): L'Année dernière à Marienbad (1961), Un homme qui dort (1974), Portrait de la jeune fille en feu (2019)
...based on movement (Czech New Wave): The Sun in a Net (1963), Valerie and Her Week of Wonders (1970), Morgiana (1972)
etc.