I'll share mine. I was at the Castro branch last night and tried four different flavors. I'll start off by saying I'm pretty sure two of the flavors were labelled incorrectly (pear/guava), so I'm not sure what's going on.
Pear: I thought it tasted decidedly un-pearlike and dismissed it immediately.
Pumpkin: not bad. Great color and texture, but I personally would have liked a stronger pumpkin flavor. I appreciated that this version didn't assault me with cinammon.
Guava: I liked it, but it had a slightly sour edge. The more I tasted it, the more I realized it tasted like bosc pear. I think this may have actually been the pear, and the one next to it (the first one I tried) guava. I'll probably never know. Didn't love it. Like the flavors above, there wasn't enough fruit flavor or aroma. It tasted like sweet ice with a little fruit poured into it. Having not been terribly impressed with Naia in the past, I was ready to write off this place forever. Then...
Mango: Wow! Revelatory. Quite possibly the best mango product I've ever eaten. The fruit flavor hit me full force, the texture was incredibly smooth and creamy, and the aftertaste lingered in my mouth and nasal passages. I could eat this every day. It was more mango-like than most fresh mangos I can get my hands on in SF.
What other Naia flavors are this good? I really like it when gelato flavors just come up and smack me in the face. Like the pistachio at Tango Gelato on Fillmore.