Being a full-stack programmer also means that when I join a team in a pure front- (or back-) end role, I can mesh quickly and comfortably with the others, as I understand the challenges they're tackling. My philosophy is that there's something new to learn from everyone at the table, and that every collaboration is productive if you're patient and understanding. I enjoy it when I can do deep dives with customers to really understand their pain-points and wish-lists, as it's always resulted in a better roadmap to MVP and beyond.