What makes a watch collection feel truly cohesive to you?

Hey all — Alex here. I’ve been thinking about cohesion a lot lately. My first “real” watch was a Hamilton Khaki Field Mechanical, and it set the tone for what I value: legibility, comfort, and a bit of history. Then a Seiko SPB143 came along for water duty, followed by a Baltic Aquascaphe because I couldn’t resist that beads-of-rice charm. Recently I added a Formex Essence for the bracelet engineering alone. On paper that’s field + diver + diver + sport, but on the wrist they feel like chapters of the same story rather than duplicates. What ties them together for me isn’t price or brand—it’s fit (manageable lug-to-lug), everyday versatility, and movements I can live with long term. I’ve passed on some gorgeous pieces because the case sat tall or the bracelet lacked micro-adjust. No shame in loving the spec sheet; I just need that frictionless wear. How do you define cohesion in your own lineup? Do you set rules—like one diver, one GMT, one dress—or do you chase a theme (color, era, movement family)? What’s a watch you love that just didn’t fit the narrative and had to go? Would love to hear the frameworks (and photos) that guide your keeper decisions.