I like utnayok for it's earliness, compact plant, and size of fruit. The flavor could be a lot more intense, but there is a subtle fruitiness. It could also use more disease resistance, but so could most of the micros minis and dwarfs I've tried. Mine ripen yellow-orange which I assume is a tangerine-gene type. Mine have points but not as pronounced as zipcode's. Seed source was
http://www.sampleseeds.com/
Betime's Macbeth is very good. So is Maskotka, and Beaverlodge Plum is worth a try. I like Vilma in the micro category, but don't have a lot of use for the tiny cherries.
I'd be interested in an op version of Terenzo. I'll add the f1 to my list for next year.