As Parma TeleMon noted audio taper is most commonly preferred.
You'll need pots with a solid shaft to fit your stock set-screw knobs correctly.
I like the CTS pots made like these
from Mojo, with the short .25" bushing and dimpled bottom. The pots I most often find in Maryland local stores are the more common Allparts branded pots which have the longer .375" bushing and flat bottom like these
. If you get those with the longer bushing, you'll need a couple of extra washers (either the star or flat type) under the pickguard or else the knobs will be left sticking high off the pickguard surface. I also prefer the dimpled bottom style for its easy turning. I can get the flat bottom style to turn as easily by disassembling it, removing the excess grease in the pot bottom and lubing it with good spray tuner cleaner; or by spraying lots of that lube/cleaner through one of the holes and using it a while (turning it a lot). But the dimpled bottom type turns easily when I get them, without having to work on them.