Pretty much everything he's done is outstanding (particularly The League of Extraordinary Gentlemen, a literary geek's fantastic dream), but I think my favourite of all of Moore's many, many series and books is Top 10. It's basically Hill Street Blues with superheroes - it's set in Neopolis, a city where everyone has super-powers, but it doesn't feel like a superhero comic a la X Men; it feels like a really good cop show. The characters are believable, likeable people first and "superheroes" second, and the books are sometimes very funny and sometimes very moving - pretty much every one of the three books has made me cry quite a bit. And there are so many tiny, geeky jokes in every frame - little visual references to myriad other elements of pop culture. In one scene of the second Top 10 volume set in a transport station, we see a bunch of people in the far background bearing placards demanding better wheelchair access. If you look closely, you can see that all of these tiny figures are famous wheel-using characters from the world of comics and science-fiction - one is Barbara 'Batgirl' Gordon, one is X-Men's Professor Xavier.....and one is a Dalek. But my favourite of all the Top 10 volumes is the most recent offering The Forty Niners, which is set during the founding of Neopolis in 1949 and which is simply one of the best graphic novels I've ever read. And yes, it made me cry too. And laugh. And go, "oh wow, that's so cool!"
And there are very few writers who can evoke all of those responses. Here's to you, Alan Moore. Long may you roam around Northampton, making up the strangest and most wonderful stories in the world.