Well said squareroot!
As with all drugs I've taken, MDMA had a wonderful, magical effect when I first took it - in my mid 40's. Luckily I had the sense by then to know it was not the answer to all my problems, living the rest of my life in a state of Ecstasy! If any drug could do that it would be the most potentially marvellous, yet dangerously addictive one ever invented...
The thrill wears off - that is the rule with all drugs, and all thrills, be they dangerous driving, flying a plane, sex, drugs and rock 'n roll in general. MDMA is just another high... (Roxy Music... about 'love'?).
I went through the usual initial process, taking more and more, in conjunction with other things and other, ever more 'exciting' situations, and it was great. Lasted a long time, and the benefits to me as a lifelong, incurable depressive were immense. Even so, the 'door' it opened was opened with the first pill, and opened forever in my case, something I'll never regret. Keeping it 'ajar' helped... but it can't be opened again, it fell off it hinges and was trampled underfoot long ago.
The old expression "less is more" (which I heartily loathe as a rule, when used by puritans and sycophantic turds to stop me enjoying myself) actually does apply in the case of MDMA. It does need treating with respect, and in my case, with love and thanks, for it had a profound effect on me, and as I said, opened a door in the same way LSD did in my late teens.
Such things are rare and precious, and an aid to spiritual development in my experience. We humans cannot live in a drug induced state of wonder and ecstasy for long, it inevitably wears something out. That did not of course stop me hugely enjoying necking vast quantities of MDMA for a couple of highly enjoyable years, but when I found myself no longer enjoying an evening out in the pub without, I stopped. It wasn't painful, and I have taken it since on rare occasions. I look forward to taking it again, after more than five years without - it'll be fun. I'd never say don't take it to anyone, I really, honestly believe the world would be a far better place if everyone did at some point (like my parents!), but not every week.... maybe my dad?
Altogether, it is strong stuff, and needs to be treated carefully, Do it too often and overdo do, and you'll spoil it. It won't kill you, or 'drive you mad', you'll just spoil it! Enjoy it - that's what its for...