For me it's about the sound. My first few basses were passive. They sounded alright at the time, but I traded up.
My first active, a Westone Thunder 1a, really did sound good and played really well (weighed a ton though!). So I started working my way through numerous active basses, including a couple of StingRay's. The last 3 or 4 active's I owned played really well, looked great, [i]but[/i], try as I might, I couldn't get a sound I liked out of them. I played with the EQ's, changed strings, tweaked pre-amp settings etc., etc. I could not find a sound I was happy with. They sounded OK in the shop when I tried them out, but were a massive let down when I got them home.
After getting more frustrated, I tried someone's passive bass. Loved it, got a great sound out of it with my gear, so, went out to the local music shop, tried a number of different basses out, cam away with an MIM Jazz. Kept that for a few years until I got my hands on a 4003. I don't think I'll be in a hurry to go back to active's.