For me, it's a 5 string P from Lakland (Skyline). I play a P style bass for a few reasons. First, when I've had very configurable, active basses, I've usually found a sound I like and stick with. In other words, a lot of the enhanced functionality is lost on me. Second, having a limited number of controls and only one pickup makes it easier to dial in your sound to a room or group setting. I know this is counterintuitive, but on the bass itself, a little roll of the tone knob one way or the other is usually all it takes. Lastly, for most non-bass players, the P bass is the bass sound that they have in their heads. It's part of the "P bass magic" - it sounds like it fits because it's the expected sound.