I got such a nice rejection for an essay of mine from the Missouri Review, and I swear I felt nearly high for hours afterward. They said, "Your work impressed the editorial staff with its strong voice and unique perspective on the undertaking that is Disney. Though not selected for publication, the piece makes us hope we'll see more of your writing in the near future." I love am encouraging rejection, maybe more than an acceptance? It means the piece still might find a home somewhere, but I get a compliment. I try to remember how great this feels when I'm sending out my own encouraging rejections, and that taking an extra minute can really make a person's day.
I was also rejected from a residency in France I applied for, but that seems to be expected.