I'm on the fence with Flea. I have no doubt what his fingers can do, but there are times when I ask, "What the hell is he thinking?". One song, he's tight and fluid, the next, he's an epileptic in a rage. He's also used a number of basses, so if you're having a bass-related conflict, you might want to elaborate.
In short, my ears hear farts and flailing arms, or warm tones and structure. Never the two shall meet with Flea.