I classify MDMA in the same categorie as Shrooms, DMT, LSD, Mescaline actually. Apart from the hallucinogen effect, but the enthogenic and empathogenic blast is stunning.
Enthogenic blasts on basic psychedelics go hand in hand with streams of thoughts, hallucinations and visuals. So you have your focus on more aspects during the experience.
This makes XTC unique, it allows you to fully enjoy and be aware of the enthogenic state of mind, since you don't have to deal with visuals, deep thoughts, hallucinations. The amphetamine component makes it even all more bright and intens. Clear vision, and not filled with patterns or anything.
Deep conversations lead to a massive objective interaction, since one is not stating his thoughts with his ego involved. Though one should always keep in mind that regretness of confessions can spoil the day after. Since that day is part of the experience as well, there's still a lot of serotonine actived, physically a deep station of relaxtion instead of energetic.
In fact, an entire E experience last somewhere from 24 up to 30 hours. The euphoria and energy 6 hours if dosed right under the right circumstances.
It's such shame that it's often used so wrong by youths, combined with tobacco, alcohol, amphetamine etc. When tired, or unplanned.