Having all your memories of something good wiped completely is better than never being allowed to experience it again.
EDIT: I don't think I conveyed what I meant well enough in the post. I was talking about something like, say, reading. It's my favorite hobby. If I was forced to never read again, I'd be absolutely miserable. But if I completely forgot about reading, there wouldn't exactly be anything to miss.
Strongly disagree. The memories themselves are nice. We should be able to remember the past for it's own sake, without worrying about the future and what it will involve.