If you've found this post then you've reached the stage of "what keycaps do I get" of the mechanical keyboard hobby.
PBT Keycaps vs. ABS Keycaps - Das Keyboard Mechanical Keyboard Blog
ABS vs. PBT Keycaps: What Are the Differences?
Abs Vs. Pbt - Battle Of Keycaps On Your Office Desk
A Guide to Keycap Profiles and Materials - Switch and Click
Understanding Keycap Materials: ABS vs. PBT – Apos Audio
Should I buy ABS vs. PBT Keycaps?
ABS vs. PBT Keycaps: Is There Really a Big Difference? - History-Computer
ABS vs. PBT Keycaps: What Are the Differences?
ABS vs. PBT Keycaps: Keycap Materials You Should Know – Keychron
ABS vs PBT: Which Makes Better Keycaps? – The KapCo
ABS vs. PBT Keycap Sets for Mechanical Keyboards - Glorious Gaming
ABS Vs PBT Keycaps - What Are The Main Differences?
ABS vs PBT (fixed) : r/MechanicalKeyboards