Hey, I'm proud to be a nerd!! I don't expect my place under the umbrella to become crowded, however.
The suggested term 'psychonaut' makes me wonder about the connotations of that term in wider society. For some people, any word prefixed with 'psycho' is a loaded term. Case in point, I once mentioned to someone whom I thought might be a bit open-minded that Coleus plants were thought to be psychoactive and he replied, "Does that mean it turns you into a psycho?" He may have been making a joke at my expense but I think he was just being ignorant. I don't especially think of myself as being a psychonaut anyhow, regardless of whatever my track record might indicate.
The term 'Nexians' has been used on occasion. I guess this is significantly more obscure than 'psychonauts' as a term.