I would want them to live on!
Live and grow and have the best life possible.
To want them to go with me seems awfully selfish, even after I'm gone there is so much good they can do, so much happiness and joy they could experience. They will have family's of their own some day with children and grand children. Wouldn't take that away from them for anything.
Sure, it would be hard on them to have to move to a new family, but I have plenty of good family and friends that would take them and raise them as their own. The struggle may make them stronger, happier adults. I know they would be sad and miss me, but I would defiantly want them to live.
I'll watch them from the afterlife and welcome them with open arms when it's there turn to go.