According to my Springtime Flavors poll, berry was readers' top choice for a seasonal flavor. In fact, berry beat out citrus, the next highest rated pick, by a 2-1 margin.
I voted for rhubarb--just to be different. But I think a strawberry-rhubarb cookie might be fun to try. Here's a list of just a few flavor combos this poll has inspired:
Thanks to all who voted and commented. You've given me some great ideas! Voting still remains open, so feel free to weigh in.