Requirements gathering gets confusing when one starts reading about user stories, use cases, volere templates and numerous other techniques invented to capture them. Add to it, the techniques used to prioritize requirements (MoSCoW) and then estimate them (FP points, Use Case Points, User Story Points).
Key lessons I have learnt/re-learnt
1. The details captured in use cases are more useful to developers and testers.
2. User Stories are very useful in discussions priorities with the client & in planning iterations. Each user story, in fact, corresponds to a scenario within a given use case where a scenario is defined as a single path of use case execution.
