For general forums, the ones mentioned above are ok.
Reptiles Magazine even has a similar, general forum. And there is the Reptile Geeks forum, which I joined, but virtually never use. I guess I just find the general forums, just...too general...lol! I have found that USUALLY (though not always), the general forums tend to attract a lot of beginners. Then when they decide what they REALLY like, they tend to drift off to 1 or more forums more specific to their interests, leaving the general forum more to those who haven't decided yet. The specific forums often attract beginners, who may stay on once they have moved past that stage, providing a more varied membership.
Of course, there are some "ol' timers" who just like general forums, and can be interesting to "converse with" on those sites. General sites just don't seem to suit me personally. But it is a good idea to "try them on for size" and see what fits you the best.