I usually research the reviews pages to pick new vendors, but unless there is a huge hype about a specific flavor, I pick my own flavors from each vendor.  I basically figure if tons of people love a vendor, I should at least try them and give them a shot.  And it has worked for me... I now know more what to look for in vendors that I will probably like.  I tend to like the natural artisan type vendors the best.  It usually comes with a higher price tag, but its usually worth it to me.  I can taste the quality and I appreciate it wholeheartedly.  I now tend to stay away from the vendors that have HUGE lists of flavors.  I look at it kinda like restaurants... if you go somewhere that has a 20 page menu, its probably not as high quality as a restaurant that has maybe 5 or 6 things on the menu.  Sure, some items might be good, but I am much more likely to be blown away by the fancy restaurant.