Right now, the sweet worms are popular 'round here.
Personally, I feel like worms > bears > anything else. I'm a purist, so I haven't tried the sour / flamin' hot / other flavors.
What I can say is not all gummy worms are created equal. I notice when you stray away from the junky (made from horses) brands into the healthier more "boutiqe-y" brands, they get smaller and less satisfying.
I have a bag of organic, natural fair-trade, macrobiotic, sustainabl-harvest farm-to-table, gogi-berry-infused, antioxidant-rich, 12 grain, whole-grain, gluten-free, cruelty-free, vegan, non-genetically-modified, zero trans fat, free-range worms and they are awful.