lol this thread is weird. I've never met anyone who liked Waterworks, Burial Mounds, or Collossus. Never once played a custom game on them either.
Hopefully that dude is right and everyone can agree that Backwash sucks...also the one from DLC that had the statue of the prophet and the huge tree in the middle. I literally loathed that map.
Waterworks, Burial Mounds, and Colossus were fantastic maps. The latter two were pretty popular too. Backwash was probably the only bad map in Halo 2. The other map you mentioned is Gemini. I never really understood why everyone hated Gemini. It wasn't the best map by any means, but I liked it. It was certainly better than Halo 4's maps.