Currently collecting hardcopies of books when I can find them, especially if the print is larger than the paperbacks. Yes, I'm old-school and prefer paper over displays when I have a choice. Need to replace old books, complete some series, and start reading again.
I was always a voracious reader growing up. Once in the AF and on the road, a book went when I room to pack one. Most reading falls into the SciFi/ Fantasy, Military Fiction, Military History/ Photography genres.
I've read so many SciFi/ fantasy books over the decades, and many of them at least twice, had to put some thought into this. Books/ series I can recall reading at least 4 times:
Cherryh - The Faded Sun trilogy and the first three books of the Morgaine series (my Faded Sun copies disappeared years ago and the Morgaine paperbacks are literally falling apart).
Bear - Forge of God and Anvil of Stars.
Heinlein - Starship Troopers, The Moon Is A Harsh Mistress, Friday.
Burroughs - Tarzan and Barsoom series.
Clarke - I started the Venus Prime series, but stopped at volume 3. Read the three I had a lot of times. Need to get all of the books and start over.
Drake - Hammer's Slammers, most of the series but I know I've missed a few. Need to get all of the books and start over.