Yes, I've enjoyed reading the Superman, Batman, Wonder Woman, Spiderman, Green Lantern, Hulk, Captain America and others he's created. What's that? He didn't create them? He didn't actually create all that many who even come close to those characters?
Well, at least his Watchmen characters are entirely original, not based on any other characters or anything.
And of course he created all those characters in his other most famous work these days, LOEG. It's not like he ripped them off and then justified it by saying essentially that he's a genius, so it's allowed with him, and anyone who rips of the characters he ripped off in the first place isn't, so they're bad people.
Okay, turning off the /sarc tag, sure, he created some characters, but like I said, none of them come close to having the staying power and iconic status of so many others whose creators he dismisses because they aren't Alan Moore. Sure, he's written some nice stories, but let's face it, so have others. I'd put Gaiman's stuff against the best Moore ever did in a heartbeat for example. And I'd also say that in absolute terms, DKR was a better overall story than Watchmen. More engaging characters, and it holds up better, even though like Watchmen, it's a period piece.
Sure, he revamped some characters like Swampy, what does he want, a statue? It isn't like no other writer has ever taken a character and brought a fresh take to it that revived the character.
Strangely, I do agree with him that DC shouldn't revisit Watchmen, but not only because it was a complete story and didn't need to have anything more told about it, but also because I just don't think it was a great as it's been made out to be. And I actually have the trade and have read it a few times. It's always a nice story, not terrible inventive, but well done. Never the be all and end all of comics though. I would for example put Gaiman's Sandman over it, and Maus, and others as well.
I also do agree with him that Johns' taking his throwaway GL stories and using them wasn't a great idea. But not because I thought they were untouchable like he seems to, or that using them reflects a lack of creativity, (after all, he does the very same thing all the time by filching other people's characters----and I don't see anything wrong with that either, so long as he or anyone else does it legally), but because Johns fucked it up with his silly reducing an epic story, (The Empire of Tears for example), to debased crap. But that's Johns for you. He's not really a guy who brings the sense of awe and wonder that others can, (including Moore at his best).
Bottom line is Moore was a very good writer of comics. He wasn't the best ever. He wasn't Jules Verne or the like, as he seemed to want to imply. He was simply one of the better comic book writers, a guy who helped elevate comics as a medium beyond kid's reading. He should be happy with that, stop badmouthing everyone else, and get beyond whatever he imagines DC did to him. If he never wants to work for DC again, that's fine, I can understand that. But for his own sake, he should stop wallowing in bitterness and move on.