jrd, your "50" posts need MOAR PICS.
I like TNM's list of cars. I limited myself to race cars because, as he alluded to, 50 of any kind of car is almost impossible to set definitively. And his reminded me of a sweet lover I left off the list:
The tie was a bit of a challenge, actually. In looking closely, I noticed that most of the ties I reached for have some blue. (Some I could have gotten away with, but I wouldn't cheat my fellow forumites.) I arrived at the linen tie almost by process of elimination.