As in regards to console hacking or just general gaming communities for each console?
Historically for console hacking i'd say the scene for the original Xbox was one of the best, specifically sites like Xbox-Scene and Xbox Hacker which were some of the major sites in the community. The sites were well moderated and good discussion was had.
For gaming in general i'd say more are on par with each other for the various platforms out there.
If I had to say community that generally stands out above the rest it would be the Pokemon Go community. This has brought people together locally like no other games has in the past, or probably will in the future. Even the broader internet community for Pokemon Go is good, sites such as the The...