I typically stick with fingerstyle when playing bass, but for the punchy punk tone I was going for, I required some sturdy picks.  I got a set of purple ones and they're definitely thick and rugged.  They have a good grip, so even sweaty fingers won't lose them.  I would recommend these for anyone who is going for a more "pick" sound for their playing, because these have a very strong plinky sound because of the hard plastic material and thickness.