#1
i was told this morning that linear pots are better than audio pots for tone controls. i thought audio was better in both aspects, since it gives a more gradual sweep.
#3
Just depends on your preference like codemonk said, log A has 30% of the pot's value at halfway and log B has 10% at halfway
Guitars:
LTD F-50
Yamaha EG-112
'77 Harmony
Roadworn Starcaster
Gretsch G5120

Amps:
Vypyr 15
Epiphone Valve Junior combo