Great question, @Jurisdiction! And although I believe we’ve had multiple threads dedicated to this very topic, it sucks me in every time. It’s fun to reassess which are your actual favorites versus which were fleeting interests and check out other DCUer’s favorites too!
My Top 10 Favorite DC Comics Series:
*all linked to read here on the DCU (if available)
Kamandi: The Last Boy on Earth
*I didn’t realize until after I wrote my list that there were so many other Kamandi lovers out there! It was so rare to one comic store owner that when I asked him if he had any Kamandi issues in stock, he came out from behind the counter and hugged me!
I’m counting Vertigo as DC too, because technically it kind of is…
THE OTHER HISTORY OF THE DC UNIVERSE
PRINCE OF CATS – It was originally at Vertigo, but the writer and artist, Ronald Wimberly, took it to Image Comics.
THE NEXT BATMAN: SECOND SON – I make allowances for what I thought was less than stellar art because it was a weekly digital series, but storywise, this is among my favorite DC series ever. I thought it was near perfect from start to finish.
BATMAN: THE IMPOSTER – it’s the perfect Batman comic to me.
THE NICE HOUSE ON THE LAKE
GCPD: THE BLUE WALL – It’s like GOTHAM CENTRAL, only better.
THE RIDDLER: YEAR ONE – I really liked The Batman, and this is a direct tie-in to it; and a tie-in that’s actually very good.
DETECTIVE COMICS – The Ram V and Rafael Albuquerque run.
Oh, and I’d rate these all a 10 out of 10.
Also, I’m constantly updating my list because there’s so much new stuff coming out that like.
I can only do Minis. I need a lot more brain power to think about full series runs. These are all 5 out of 5 for me for different reasons.
Batman: Black and White
The Dark Knight Returns
Batman/Teenage Mutant Ninja Turtles
DC New Frontier
Batman: the Long Halloween/Dark Victory
Superman: Up in the sky
All Star Superman
Batman versus Predator
Batman/Superman/Wonder Woman: Trinity
Detective Comics by Tynion (fav Rebirth)
Green Arrow: Longbow Hunters (and Grell series that followed)
The Question by O’Neil
The Saga of Swamp Thing by Alan Moore
Sandman by Gaiman
LoSH by Levitz and Giffen (and Giffen alone)
Outsiders (80’s run)
Superman For All Seasons
Doom Patrol by Morrison