I prefer passive, like the EMG:s. Wait! EMG passive? Well, you HAVE a battery or two, you have internal preamps, but it acts just like a passive without the buzzzzzzzzz and s**t. My P-bass is entirely passive, but has a very active passive filter(!). I installed the Stellartone Tonestyler, a switch to turn with 16 steps rolling of the top end while leaving the mids unharmed all the way down. Well, at the cutoff point you get a noticable mid hump colouring the tone in a nice manner, but hey - that's passive. I prefer not to have a lot of knobs to twibble around with, just volume/balance - volume - tone. I have a secret dream of having an all passive bass without any controls at all, just one pickup in the sweet spot...