I normally use Exodus for it's active disassembler feature. I'd like to play through a lot of the games I have to check for unused stuff myself, but sometimes I wish I could use someone elses replay/speedrun data to play the game for me. This would also be nice if I wanted to play through one version of a game that has very minor differences, and would like to use a recording of the key presses I made to recreate a play through in another version.