What clues support a definitive reading of the Inception ending?

[AvaW]

I just rewatched Inception for the fifth time, and I'm still debating the final scene with the spinning top. While the common interpretation focuses on whether Cobb is still dreaming, I'm more interested in the emotional resolution—his choice to walk away from the totem and embrace his perceived reality with his children. For fellow fans who've analyzed this film extensively, what are the most compelling thematic or narrative clues that support a definitive reading of the ending, one way or the other, beyond just the mechanics of the totem?