I love Dave & Andy's more than anything and it's one of my favorite places to go in Oakland. They're open all year round, which is a plus when you're craving cold treats in the winter and Rita's isn't open. The smell of fresh waffle cones is absolutely delectable. They have a variety of options to choose from, including frozen yogurt and low/reduced fat ice cream. They also make shakes and floats, sell cartons/pints of prepackaged ice cream/yogurt, and ice cream cakes! There are new yogurt/cream flavors practically every time I go there. I tend to go for the unusual ones, like the chili/habanero flavors. My favorites are the coconut frozen yogurt/ice cream, white chocolate cinnamon habanero ice cream, and cinnamon apple granola (?) yogurt/ice cream. You can try flavors before you purchase if you're not sure what to get!
Everything is priced relatively cheap considering how delicious everything is, and staff are always friendly and generous with sampling.