I like DMT-Nexus. For one thing, it's the domain name; it'd be confusing as hell (and break links to the site from all over the net) if the domain name were changed.
But also, this site is a community of people interested in the DMT experience. I think that's part of why we have such a good community here. Other sites that focus on entheogens in general, or on psychoactive substances in general, tend to attract a crowd that's somewhat more... shall we say "common denominator". As has been said before, the general maturity and collective IQ here is noticeably higher than at other similar sites, and I think that has to do with the sort of crowd that DMT attracts. All the other topics that are discussed here (other entheogens and plant discussion) are simply an area where many of our interests tend to overlap. So much of the philosophical and mystical discussion here revolves around direct experience with the spice.
Personally, I think this site would lose some of its valuable characteristics if it became just another psychoactive substances/plants forum. I think keeping the primary focus on DMT is central to the spirit of this forum and this community.