I've been using the "Lite Traditional" (1.5mm) for general six string strum work and leads. I like them a lot. To be fair, I was skeptical at first, but decided to give them a try since Vinnie was offering up a free sample pack.
The trick is to relax the right hand and let the pick flow over the strings rather having it try to plow through them. I've also found the the picking is tighter as you don't experience the "delay" of a more flexible pick bending and passing over the string. It took a little time to get used to the difference, but I'm sold now...