First off, why use a pick to begin with when you have five on your right hand? Even if you dont like a type of music listen to or watch the bass player and his/her technique. My best suggestion is jazz players like Victor Wooten. That man can make you cry without saying a word. Look him up and listen to his solos. Picks i think slow you down, you can downward stroke the strings with your nails to make chords.
Ooh and one last thing, picks do NOT help you play faster. I used to play with one until i came across a Victor Wooten video of a solo and now i can play faster without one.