The ashes of Scotty (James Doohan), my favorite Star Trek character, are going to be launched into space. The symbolic act would have pleased him, I think. Although we only know the part that the actor played and not the man, from all accounts, James Doohan was every bit as nice a guy as the character Scotty.
My favorite Scotty episode? I like the second generation episode, Relics, where Geordi and Scotty have to escape from a Dyson Sphere. The contrast of styles is wonderful.