I hoard a few every now and then, like right now for example, though I only have one fursona, which has grown on me so much I actually get bored being on her sometimes ^^;
But I do have one major OC which I will keep forever, Maxwell, he's a pwetty dire wolf, not too realistic looking but I love him, he's a bookworm and blunt. Plus I always have him in RP mode so when people talk to them it's funny. And more people know Maxy than Thyme, my fursona lol.
But atm I have like....four OCs that I will end up deleting once the RP I am in them with is over, for example: Claude from Black Butler (an anime), Naka (a lion), Thian (a lion), and Taimu (a lioness)....I have a lot of lions o.o But once I either get bored with them or the RP dies out, I delete them.
For IW, I only have Thyme and another char named Decadence, and he's like Maxwell, he's my forever OC which I am still working on.
But I try not to hoard too many and I may even delete my keeper OCs if I end up HATING them later on lol.