My top preferences are these:
Golden Age
Post-1945 Green Lantern, All-American Comics and All Star Comics
Kirby Newsboy Legion and Sandman
Black Cat Comics (I have most)
Timely Terrytoons
Other funny animal comics
Atom Age
Fox & the Crow and other DC funny animal comics
Jungle and other GGA comics
Atlas westerns
Dell and Harvey funny animal comics with Tom and Jerry, Daffy Duck, Goofy, Felix and Spooky being titles in which I'm particularly deep
Atlas and Harvey war
Howdy Doody, Lone Ranger, Turok, Indian Chief, Dick Tracy, Li'l Abner, Terry and the Pirates, Blondie & Dagwood
Men's sweat magazines
Silver Age
DC superheroes & adventure (the bulk of my collection) with favourite titles being Green Lantern, Flash, Aquaman, Hawkman, Justice League of America, Mystery in Space, Challengers of the Unknown, Atom, Wonder Woman, Sea Devils, Metal Men, Tales of the Unexpected, House of Secrets, Strange Adventures, etc.
Archie Fly and Jaguar (I have most)
Charlton Captain Atom, Gorgo and Blue Beetle
Star Spangled War Stories, Enemy Ace, Sgt. Rock, Haunted Tank and MiG covers
Select Gold Key, e.g. Doctor Solar, Phantom, Man from U.N.C.L.E., Voyage to the Bottom of the Sea, M.A.R.S. Patrol Total War
Drag Cartoons, Big Daddy Roth, CARtoons, Hot Rod Cartoons, Creepy, Eerie, Vampirella, Skywalds, Mad and Sick magazines
Bronze Age
Joe Kubert Tarzan
Phantom Stranger
Adventure Comics with Spectre, Supergirl and Aquaman
DC 100 Page Super Spectaculars
Adventure and World's Finest Dollar Comics
Neal Adams DC
But I'm surprised you had to ask. I've made no secret of my preferences. Just look at my posts. I've posted thousands of scans from my collection in the last fifteen+ years.