I have a small (2k+ stars) niche game-related project. The hardest part for me is saying "no". If someone proposes a change that I think is out of scope, or is not something I want to maintain (maybe the introduced complexity is greater than the benefit of the feature) I find it difficult to explain that in a way people understand. Often times people get offended by it and then become angry at me, and over time it becomes very draining.