I keep mine. All of the painted ones are out on display in my gaming room. In my entire painting history I have parted with two minis, one to an Ex-Girfriend, which I got back when she became Ex and one to my Mom.
Mine are divided up on different shelves, one for Fantasy, one for Sci-Fi, one for my Orc and Goblin Army, two for D&D minis, one for Mechwarrior minis. I also have a really nice glass and wood display case that holds my best painted stuff, a Mordhiem warband and my Space Hulk stuff.
Besides display I would love to say I use all of them for gaming, but I don\'t really. Unfortunately I don\'t get too much gaming use out of most of them. I\'m currently running D&D 3.5 so the D&D minis and occasionaly some of the non D&D fantasy minis get used, but I usually stick to the WotC pre-paints as they better reporesent the creatures I need. I also play D&D 4th Edition, Living Forgotten Realms, for that a Middenhiemer I got in a Mini Exchange acts as my Paladin of Tempus (I still have to get a pic and get him on here, he\'s one of my best minis ever). My Orc army hasn\'t hit a table in over 5 years. My Mordhiem army about 4. My other stuff it\'s probably been about 20 years since it\'s been gamed with.