The team I'm on uses Agile, but in practice it's a combination of Agile, Kanban, and Waterfall. The tasks we work on are usually pretty big and undefined. And it's nice to meet every couple weeks to plan out a sprint. But an overall waterfall-like list of objectives drive everything, and we're not strict about adding or removing things from the sprint. So I don't know what system fits us best. Agile encourages us to document tickets so they can be worked on, which is nice.