I have Princess House crystal that we use for holidays or whenever. I don't believe in saving it for "good". I drink out of the mugs every day.
We use Corelle ware for everyday. Kids must use plastic cups (Tupperware from ages and ages ago) and I use crystal. Once they get over breaking things (my daughter is 32 and still has a habit of dropping things) they will be allowed to use the glass ones every day.
I've always wanted Lenox china but really don't need it. I've started collecting Polish stoneware, again, using the pieces, not saving them.
I love a table set with linens, napkins and china and crystal. Kind of like playing dress up when you were a kid. :)