I have this happen quite a lot because I tend to think of some really experimental ideas sometimes. But again, I like to take a step back when this happens and just sort've see everything at a bigger picture. Almost like im a third party looking at the ideas. If I sometimes feel the team member has put more time and effort into their idea although I think in my head my idea is better, I'd let my idea go and instead find ways to integrate my idea into their idea. I think partner to partner respect goes a long way.