Preacher - Read the first volume, liked it a lot.
Transmetropolitan - Read the first volume and half of the second volume, didn't like it. I felt it was very words and political. But that's Ellis for ya, lol.
Never heard of
Black Summer,
Ex Machina,
Powers, or
Morning Glories. But now they are on my list.
Y: The Last Man has been on my to-read list for a while. Sounds incredibly interesting.
Batman: The Long Halloween - Have it, haven't read it yet.
Batman: The Dark Knight Returns (as well as the other Miller Batman stuff) - I ... just ... don't ... like it. Don't think less of me, lol. The story itself is a good one, I just don't like the overwordiness of it.
Watchmen was the same way. Great story, too wordy.
DMZ - On my list.
Invincible - Loved
The Walking Dead. Oh, why isn't that on my list above? Editing now! I have the first eleven volumes but nothing screams out for me to read them yet.