Fantastische Hure said:
Serial Experiments Lain is a good, almost prophetic critique on how the internet age would affect the world based on when Japan first received the internet in the 90s. When watching it, you can draw a lot of parallels between it's world and how we consider ourselves and others in the online world, as well the the existentialism that would come when evaluating it. Definitely a worthwhile watch, though without that context, it can seem pretty mundane in some episodes. That's not to say it can't be viewed as a good series without knowing this, but it would mean you have to dig a little deeper to find what's good about it. I wouldn't say it's a masterpiece or 2deep4you like many of the pretentious fans do though. I'd rate it about a 7.5/10
It also gets major points for having a protagonist be "God" and not be a gigantic Mary Sue like almost every other series that goes down that route.
Also, whilst unrelated to Konaka, the producer of Lain also created a series called Haibane Renmei which has similar psychological focus by enough to make a Slice of Life story interesting, with many viewing it as debateably better than Lain. I know Kyo treats it with high regard, at least.