The first few basses I owned were passive, and the last couple have been active. I even owned an active 6-string which I converted to passive a few years ago.
My main player is an active 4 and I am building a passive fretless 4. I find the active bass to be easy to use. I have had it since October of 2010, and I have not yet had to change the battery. I definitely wouldn't call battery changes a hassle or expensive. It has a 3-band EQ, and I have enough time using it that I can dial up whatever change anyone I am playing with wants in just a few seconds. It's tonal flexibility surprises people, given the appearance of the thing. Together with my amp's EQ, it can get almost any sound I want.
That said, it is definitely a hi-fi bass. It doesn't cop a passive sound and that doesn't really bother me. That said, I build a little filter box that drops the signal strength some and bleeds off a good bit of treble. The result is a very fat, low-fi bassy sound that is strongly reminiscent of a passive P if I use it with just the neck pickup on the bass.
The passive fretless 4 I am building has two Bartolini narrow humbuckers (X44CBJD set), a blend control, a master volume, and a tone control with a Sprague Orange Drop capacitor. It's getting close to completion and I am pretty stoked about it. I decided to go passive on it purely as an economic choice. Adding a pre-amp and battery box would have added $150 to the cost of the bass, and that would have put the total cost outside my budget for this project.