KiCad
KiCad is my go-to for PCB design and electronic schematics. I like how it gives me full control over the layout, and how customizable it is.
I use it for: - Schematic capture and BOM generation - PCB layout (1-4 layers) - Gerber exports for fab - 3D previews for fit checks
I keep my libraries organized in subfolders to avoid clutter, and I store them in my home directory.