I’ve been building my all time favorite 100 list but my number 1 has been constantly Casino Royale. The list: boxd.it/jQWau
I usually don’t have a specific genre of choice but I love to dig into micro genres for a stretch. Lately my favorite micro genre is “people in a room talking”. The obvious ones here are 12 Angry Men, Rear Window and My Dinner with Andre. Long Days Journey into Night, Buried, Locke, Who’s Afraid of Virginia Wolfe, Rope , Tape. “Before” series works well here too. A really good one I saw recently was Big Kahuna.
This also pairs well with tiny budget Sci-Fi. Like Man from Earth, Coherence, Another Earth, Moon, Vast of Night.