The Codex's community is quite unique. Many topics discussed over there allow you to dig deeper into the structure of games and gain a better understanding of literally every aspect of RPGs; from the graphic engines, right down to programming. From obscure jRPGs, to cRPG classics you've never even heard of. From moding projects to hosted CYOAs... etc. It is, quite simply, a prestigious gaming magazine available in your browser.
I feel their classic Elders Scrolls: Oblivion review might do them justice more than I could. Just a word of caution; the community over there is very opinionated and not afraid to speak their mind, so a thick skin can be useful. They also like potatoes
