Why don't people really talk about Xenogears? EASY! The game left nothing to question for the most part. It isn't like FFVII where there is a mysterious backstory that was poorly explained. It doesn't have a great many side quests or super tough boss battles for people to talk about strat.

Everyone is pretty much in agreement that this game is beyond awesome and there isn't anything to really argue about which makes for boring conversation.

It also helps that there is no R=U theory to this whole game.