when you say “not only must I love the watch (irrespective of brand) but it also must have a good resale value (not necessarily at a profit)”
My experience is that some watch collectors are so dazzled by the aura of a "valuable" brand that they are inclined to put their personal preferences aside and - so to speak - "gloss over" the insufficiencies of the watch. They buy it because it’s a XY. And they like it, because it’s a XY.