A guitar capacitor is part of the tone control in your guitar. Which is capacitor is the best sounding is merely a matter of taste.
For some it is the sound of a vintage bumble bee capacitor while other want nothing else than Orange Drops in their instruments. As soon as you dive into the world of guitar capacitors you will start noticing descriptions like "warm", "balanced" or "vintage".
With some basic soldering skills you can quite easily swap the capacitors in most soldidbody guitars and test different capacitor types, brands and values. By experimenting bit you can then select the guitar cap that suits the sound you're after.
To get you started you'll find an overview of the most used values of guitarcaps and their application.
Which capacitor for what guitar?
|.001 μF||1 nF||1000 pF||Treble bleed|
|.022 μF||22 nF||22000 pF||Humbuckers|
|.033 μF||33 nF||33000 pF||Humbucker or Single Coils|
|.047 μF||47 nF||47000 pF||Single coils (and many basses)|