Is it just me, or is the guy on the right of the talkbass banner using horrible form? His thumb is like, WAY outstretched, his hand is much too curved, his pinky is off of the fretboard, and his right hand looks all funky.
If you watch a bass player of your choice, you'll see that pretty much none of them have "perfect form." It's what comes out of the speakers that count. Here's one of the very best bass players in the world. Check out his form.