[jinx]

That would be a toss-up between the computer and the "personal massager" for me. After them... the vacuum cleaner maybe? I rarely use the cell phone and don't calculate much (although I remember playing games on my grandfather's scientific calc with him as a kid (before the alzheimer's kicked in, when he was still a nuclear engineer)). Tivo is pretty cool, but again, I rarely use it so I wouldn't call it a favorite.