First
Hand Made Backpack
First PvP kill in Arena [zone]
First character killed by (should probably all have a first-that-kill-them achievement, too) Emperor Crush, Ambassador D'Vinn, Vox, Naggy, Phinny, Magi Rokyl, King Tranix, Warlord Skarlon, Master Yael, Sir Lucan D'Lere (undead version)
First of a given race to get to a silly-far landmark:
First Gnome in Erudin
First Barbarian in Crushbone
First Erudite in Freeport