I work on many types of developments and represent them at the City Planning Commission and City Council. Most of them I could honestly care less if they pass. A lot are big companies with lots of resources who don't care about the surrounding neighbors.
I worked one job for a small private school which was relocating to an abandoned house on a very busy road. The house was in foreclosure, so a wealthy member on the schools board stepped up and purchased the house/land. There was no contract clause stating that if it was not rezoned then they could back out. The house had been around forever and was like a landmark in the city. The school planned on modifying the inside of the house, but were keeping the original house and garage. They are a very green school, so they didn't want to disturb any of the existing trees and wanted to keep as much green space as possible.
The school started working with an architect who's kid attended the school. He had a much grander vision than the school and convinced them to design for a future student population of almost 300 kids. The existing school had less than 10 kids. The first site plan was met with tons of opposition, as expected. The lot was not big enough to handle that many students and it was on a very busy street. They met many times with the neighbors, but decided to proceed to the Planning Commission and it was shot down unanimously.
The school continued to meet with the neighbors and modify the site plan. The reduced the students from around 300, to around 150, and then ultimately around 50. Each time the neighbors would say reduce the kids to x and we would be happy and support it. They did, yet they never supported the school. Each meeting was hostile and no matter how much they altered the site plan to appease the neighbors, they weren't happy. It was always the whole, "We love the school, but we don't want it in our backyard" bit.
I kept insisting to move forward with the much smaller plan and that they would never make the neighbors happy. After a year and a half after the original Planning Commission, they presented again and it passed. At City Council the neighborhood members bitched about this and that. They wore stickers and signs in protest. It was a very tight decision and in the end it passed 5-4. It was the first time that I felt a great sense of accomplishment and was truly excited for the client.