I have a mate at work who's big into comics, so lends me quite a few.
Finished Planetary. Never read that much of it before, but loved every second of it. As far as complete series' reads go, I can think of few better. The plot is handled masterfully - never peaks too soon, and despite how long it took Ellis to complete it, the quality level remains consistent and you don't notice any blips along the way.
Swamp Thing. Boy is this a new favourite of mine! I stopped reading after making my way through about five mammoth volumes of it, but my first impressions of it help it hold a special place in my heart. Damn good yarn. Think I especially appreciate it cause of the environmental note it kicked off with. Also the first bad guy was perfect.
Also read V for Vendetta by Moore, which is sublime. I was left thunderstruck by how powerful some of the scenes in the book were. Literally couldn't continue in a couple of places. Amazing achievement in fiction. I'd enjoyed a couple of Moore's other works in the past, such as the Killing Joke and Watchmen, but this is his best piece, IMO.
Moving back to Ellis, I read his Moon Boy run which was so nifty. I love the different levels to the character, his backstory is awesome and Ellis's style of storytelling suits the character completely. I'd be eager to see how the character carries over to the silverscreen.
And I've also read Punisher by Ennis, and a ton of other stuff he's written. Top Irishman.