Maybe it's just because I don't have as much time to spend on the messageboards, and maybe it's because I don't really "know" anybody on here, but I don't have the warm, fuzzy FAMILY feeling about ENWorld.
To me, ENWorld is a great place to go to keep abreast of what's going on with WotC and all the independent d20 companies in general. Without ENWorld I'd never have been able to keep up with who was releasing what thus far. ENWorld is also a great place to get opinions and information on things just out or almost out. Sometimes it exposes me to things I might not otherwise have thought about, like why so and so in 3.5 should or shouldn't have been changed.
It serves a functional purpose. It's the best site out there for one of my hobbies, and it kills a lot of time at work.