hard to say. I have basses with Rotosound 43-65-80-110, others with GHS Boomers 40-55-75-95, one with Ernie Ball 45-65-85-105, two with Fender flats 45-60-80-100, and one with Rotosound flats 45-105 (where the G is actually a 50 labelled as 45, so they are 50-65-85-105), the Hofners with Pyramid flats 40-55-70-100... my Yamaha TRB6p has the Ernie Ball 32-45-65-80-100-130 set because it's the only EB set available, and I like the sound of those strings on it, but I'd prefer lighter sets, impossible to find.
it depends on different things:
sound, neck, radius, frets, type of instrument and where I usually play it.
to me, some necks/frets tend to prefer lighter strings (FE: the wide neck of the 50's Precision, with small and narrow vintage frets), others prefer heavier gauges (the Jazz with Roto flats, with a flat fretboard and medium frets plays like butter. the same strings on the 50's Precision are uncomfortable).
my Yamaha Attitude II has tall and wide frets, and the Roto 43-110 set feels like a 40-100 set...
if I play "aggressive pick", I prefer heavier, if I play funky fingerstyle, light is better.