I like it because it's convenient when I don't want to use my family members names, and when I don't want to write out "my husband", "my grandson", etc. And it would be awkward to have it written like "on Saturday, H and S are coming with me to WDW". So the D just makes it work. 



either that or Sugar. 
) Husband and DD means Darling Daughter. Just the way I think of them. I also like to think the D can mean Disney Husband, Daughter, Son, Wife, etc, etc.
(just like my mom used to