I’ve definitely had the most fun with Halo 3, so much time spent online and in LAN battles with friends, it still doesn’t get old to this day.
3, Reach, only in terms of maps design. with the old maps I feel that it is more spacious and has greater depth. 5 just feels like a small jungle gym.
I had and always have lots of fun on the H4 Multiplayer. It’s just the best for me.
I’m going with 5 based strictly on warzone. After playing warzone I look back at all the earlier Halo multiplayers and I can’t imagine how I ever mustered the patience to tolerate them for as long as I did.