I have had a similar experience to theapplecore, short tryptamines can have a "why not" kind of feel, if you have an extra 40 minutes or something I can find myself vaping DMT, DPT or MET, maybe 5-meo-DMT which I find very euphoric but I have to make an emotional commitment for that one.
Since the thread name reffers to addictive psychedelics, not dissociatives which I'm sure there is plenty of info on here about how addictive they are already I'll stick to the 5HT2 agonists.
For me its not a specific psychedelic thats addictive but I am totally addicted to trying new psychedelics and new combinations of psychedelics. I get and try every one of them I can find, up to 43 now. Which has mostly been a pleasant and enlightening experience but has an isolating aspect aswell, expecialy from "normal people" who would think my brain must look like swiss cheese! (while they go binge drinking every week end instead)
Also I often find myself taking threshold doses of psychedelics and going about my daily business. Sometimes I tell the people I see during the day, often not though. Some psyches work well like this, I like 2C-D for this. Maybe an mg or two of DOM or DOC, for some reason I go with the phen's for this purpouse. Some days it works out well sometimes not. It's pretty funny when I forget I did it and then smoke some weed and start tripping. In a way it's really interesting but also again isolating, unhealthy to do as often as I do sometimes.