So what are your favorite Pathfinder 1E hardcover books, softcover books, and other merchandise?
Advanced Players Guide, Occult Adventures, and Advanced Races Guide. Also the core book would be on the list but that seems to be a given.
Distant Worlds, Occult Origins, Psychic Anthology, Heroes of Golarion, and Chronicles of Legends come to mind. I am sure there are more.
Nothing that comes to mind.
APG and Advanced Race Guide, to be sure, along with Ultimate Intrigue. I also really like the hardcover Monster Codex, and wish it was the first in a series.
As for softcover, Distant Worlds is one of my favorites, together with Blood of the Sea. And Occult Bestiary is one of my favorite Paizo books just to flip through.
My quartet of hardcovers from 1E that I consider pretty much solid gold:
Book of the Damned
Inner Sea Gods
There are other hardcovers I really like, but those four are the creme de la creme for me.
This one could balloon really easily, since it encompasses every single AP volume, almost every PF1 campaign setting book, and the vast tidal wave of player option booklets. So I'm just gonna grab five I liked and get on with my life-
In Search of Sanity
Faiths of Golarion
A Song of Silver
Note that I wanted to pick The Skinsaw Murders, but it's not technically a PF1 book- it was a 3.5 book set in Golarion, so I nudged it aside...
I've gotten some mileage out of the Harrow deck, and the miniature lines have some good stuff. But I think my favorite, even though I never use them?
The pawns were sheer cost-effective, "here's what you need" brilliance for the battlemat-using public, and while I'm more "theatre of the mind" oriented, I know a good thing when I see it.
Hardcover - Ultimate Campaign. (Though I lived all the themed books too - ultimate intrigue, wilderness, horror adventures...).
Softcover - War for the Crown AP.
Other - Rise of the Runelords, Anniversary Edition - deluxe version.
* APG (wealth of new ideas right after CRB)
* ARG (so much thematic content)
* Monster Codex (flavorful description want you to run these monsters)
* Crimson Throne hardcover (reading the localized version a second time now)
* Blood of Fiends (oh, this d100 table for quirks)
* First World (Campaign Setting, writing is just stunning)
* Lords of Chaos (especially the origin of demonkind)