I had the exact same batch of feelings. The last bunch of kid-giddy feelings for me came with the Mars lander mission. So much about it, the technology, the incredibly awesome "landing" process with the lifter, and the almost immediate game-changing photos and data transmission filled me with that "anything is possible" attitude and sense of wonder. Watching this choked me up at the same time had me sitting transfixed at the screen. As I like to tell people, this is why I love the fuck outta science.