I voted "do something else" though I suppose I could have picked "be a companion"... but that didn't quite feel right. I didn't get my dog to have a companion; I got my dog to put him to work, for me. To track coyotes and deer, to carry items on hikes, to look plain mean and scare away people that have bad intentions and to help motivate me to live a more active lifestyle.
On that note I suppose one thing you left out in your poll, unless you consider it to be in the "be a working dog" category is a guard dog. (Which for the record I don't think my dog belongs in that category).
When the stars threw down their spears,
And watered heaven with their tears:
Did he smile his work to see?
Did he who made the Lamb, make thee?