You will find this information reported by travelers on many forums but as far as I know, there is no website that aggregates and provides a distribution of that information but this is a complex problem:
- What is in view at take-off, cruising and landing is different, so some chances are that some of the great views might be visible from different sides on a single flight. I recall one announcement telling passengers on one side could witness a glacier separated from Greenland. Being on the other side I could not see any of it.
- Some airport configuration have a direction of landing and take-off which may be fixed per runway but most large airports allow planes to land either way and they usually direct them to land against the wind. Winds not always coming from the same direction means that sides can get reversed. It does happen often but if you can check weather-patters and figure out dominant winds you can have a better change of choose the better side.
- Even the time of the flight matters with a considerable different in view. Landing in Quito during the daytime shows the sprawling city to one side but an even more magnificent view of the Andes and several volcanoes. Turn this to night and the andes go completely back and the city looks like a constellation made of street lights.
Seeing sunrise or sunset while in the air is spectacular, but you have to take a flight at the right time so that it is above the cloud cover during the event. At least, for those two moments choosing the best side is much easier: Sunset is West, sunrise is east.
Given all this info you will be hard-press to find a central resource since the subjective best view will really depend, on the flight, points of interest, time of day and prevailing winds (for many airports).