i derive an inordinately enormous pleasure from finishing off bottles of things, and tossing them out (yeah, yeah, rinsing and recycling them--that's part of the fun) before welcoming the lovely, chock full replacement. having a variety of things open that serve the same function bothers me. this goes for hot sauce, lotion and especially shampoo.
i have always felt this way and knew i was crazy. then i read a feng shui book that told me that I'M RIGHT. it called those almost empty bottles lined up 'dead soldiers'. vindication. i love feng shui.