Puppylinux, wifislax, porteus.
Anything slackware based has run fine for me and it doesn't take me more than a minute to get them configured for what I need.
Wifislax is a spanish kali ripoff but it has some good packages pre-installed. It has some cracking software that comes with it so I play with that once in a while.
Porteus is comfy good for if I need to carry around something to just browse the net with.
Puppylinux is bread and butter basic recovery of something that is probably on its last leg.