The inductance is a function of coil turns, the influence of the core material and nearby metal such as plates under a telecaster bridge pickup that boosts the inductance slightly as well as focus the magnetic path. As theory goes, when you double the coil turns the the inductance goes up by the square of that turn increase or 4x, in this example. Humbuckers are the sum of the two individual coils in series plus a very little extra for the slight mutual induction between the coils.
The real issue is the environment that the passive pickups see. All coil winding capacitance, pickup lead capacitance and guitar cable capacitance work together to shape the resonant frequency and height of the pickup resonant frequency based on it's inductance. Loading of the amp input impedance along with the volume and tone controls affect lower inductance pickups less and affect higher inductance pickups more. However, good or bad sounding is subjective and in the ear of the beholder! Theory just tells you what you can expect to happen when you change any of the pickup variables or the pickup environment variables.
I hope this helps.
Joseph J. Rogowski
P.S. Look at this MEF thread for more relevant information: http://music-electronics-forum.com/t40202/