Hi George.
I think I know how you feel - I'm 53.
I was introduced to mdma just four months ago. So, I never went through the crazy party/antics phase. When I was in my 20s and 30s, I was *extremely* focused on raising our children (best thing ever in my life!), and building my career (wasted far too much time and energy on this).
For a while, I wondered, How come I'm interested in trying this, and my contemporaries wouldn't even entertain the thought? Is there something wrong with me?
But, then I realized, it isn't just an mdma thing. In the past couple years, now that our kids are grown and there's more time, I've learned sailing, I've learned jiu-jitsu, I've learned windsurfing, I took a class on poker startegy (VERY interesting!), I participated in my first ever race (running), I took part in a Warrior Dash, I took a course in handgun safety and care (assembly/disassembly), etc. - later this winter I hope to take up skiing again, I'm going to try rock climbing for the first time, a guy I work with has said he'd try whitewater rafting with me, and my wife still owes me taking a tennis class with me. Whereas my contemporaries are still killing themselves on the job, and admit all they do after work is pretty much go home and.... watch TV.

Yikes.
So, I've come to accept that I'm different from most - and my friends tease me about my antics (although they have no idea about the mdma thing!), but I don't care.
I don't think there's anything wrong with me that I like mdma - or that I like these other activities/hobbies. I want to keep liking them. I'm comfortable not being like the stereotype people have constructed for me.