I chase the usual array of operating awards. These days, I focus on increasing my DXCC Challenge count, and hunting down the WPX Award of Excellence, but I am also mindful of working collecting SOTA and IOTA activations, county-hunting, etc.
I love QSL cards, but the cost of postage tends to limit me to requesting cards in support of my wallpaper-hunting. I do also respond to QSL card requests (postage and SAE appreciated, but not required), and I upload to Logbook of the World and eQSL regularly.
Former QSL images: