I have a hard drive only for Anime and I don't even have that much. It's around 140 gigs.
I hate recording DVDs though, I like the option of watching anything I have in the instant I think about it, not going to the trouble of finding and inserting the DVD. Like if someone here is talking about a certain episode about an old Anime, I can quickly watch it without trouble. Besides, my PC is connected to my TV so I don't really need a DVD player to watch on a bigger screen.