Are there any particularly interesting dialogue systems?Life is Strange is a must play imo. It allows you to try out nearly every dialogue choice and unlike most games, this shows just how powerful the writing is.
A thought I had about dialogue systems:Spoiler for Hidden:
Almost all games cheat with ambiguous dialogue and outcomes. e.g.
"Player, what do you think about Mr. X?"
"Mr. X is an evil man." or "Mr. X is misunderstood."
"Yeah player, I'm glad I'm not him."
Mass Effect is infamous for this and it's one of the main reasons why dialogue choices often misalign with player intent. Witcher 3 uses the same trick but handles it better.
Horizon Zero Dawn had pretty minimal dialogue systems but they did a great job feeding world events into the dialogue. Every side conversation would be a little different depending on which quests you had achieved.
If you are looking for a different take on dialogue systems, check out Baba is You if you haven't already.