Voyager EMH
Slipper Wearing Plucker of Pheasants
Someone to keep my clubs dry if it was raining could be useful but basically for me it's a no even leaving out the ribbing.. I know the lines well enough on my own course to play what I think is the optimal shot and would rather be responsible for my own decisions. I am not a great putter but whenever I have played a foursomes with people who are better putters than me I have never found their reading skills helpful.
A caddy on a course that is unknown to me would potentially be of great benefit as I am not always sure of the best lines but I'm too tight fisted to employ one unless it was a very special occasion.