I'm not sure what to think about this. On the one hand, the eventual loss of Terry Pratchett will be a definite blow to both the fantasy and the humor communities. On the other hand, I'm not sure I can imagine anything more horrifying than being an author, a creative genius, and having to live out the rest of your days not even remembering who you are, much less who your characters are.
Terry Pratchett starts process to take his own life
Whether you agree with him or not, you can't help but be sympathetic. Terry is a wonderful author and, by all accounts, a wonderful man. He will definitely be missed . . . the only question is if he'll still be around (physically) to remind us of what we're missing.
Personally, I hope Mort (Death) is the same wryly humorous old soul that Terry has always told us about. Heck, Rincewind escaped him more than once . . . but maybe that was just to buy Terry a little more time.
Personally, I'd like to say a HUGE THANKS to Terry Pratchett now, while he's still able to appreciate it. It's not my place to suggest his thoughts on assisted suicide are right or wrong - I don't think you really can, until you've faced the decision yourself - but I know a world without his magic definitely is wrong, regardless of whether the laughter dies, or slowly fades away.