I have the '85 Star Jordan rookie card (ungraded).
I also have a 03-04 Bowman Chrome Gold Refractor Lebron rookie card (also ungraded).
Getting cards grades scares the crap out of me and to get it done right is extremely expensive, so I haven't done many.
One of my favorite cards I own is a 91-92 Upper Deck Dominique Wilkins card that I got autographed in person. The pic on the card is awesome and just having 'Nique sign it is a great memory.