My primary collection is Texas, of which I have 42. So for me the Holy Grail is any Texas that I don't have. As to your question, I only have 2 Martians NWA 998 and NWA 1195 and I can't decide which is my favorite. They both display very well. While I'm at the NWA 482 is by far the best Lunar and the Tatahouine is my favorite Asteroid Vesta. Pete