Glad you're testing the waters here, I find this a pretty good little spot to be.
Welcome to the boards!
-Firstly, what is the single most reason you come here?
I was trying to find others like me and help understand my experience.
Also, I was in a lot of denial and chaos when I first found this forum, so I don't
remember 100% why I first came here, but I do know why I stayed! It is pretty safe
and supportive.
-How has it helped with your journey?
I've found it good to have support when I feel isolated or alone with this, mostly my
therapy has done the most for me, but it really helps to have support along the way.
-Is there ever any "drama", frequent upsets to the group as a whole, and if so, how is it dealt with?
I haven't seen much drama on these forums, the moderators are really good to catch things and everyone
seems pretty good to talk misunderstandings out.
-Do any of you have "higher than average numbers" within your systems?
I would say around 5 full functioning pieces to my system and 20-30 fragments (my pieces that serve a purpose or hold
a memory and can talk but either blend in but haven't lived life enough to have a fully functioning personality)
I'm not sure what "higher than average" is, I just know that everyone is different and makes as many pieces as
is necessary and helpful at the time.

-Is it really better to know that others are living with the same diagnosis, or does it make it harder considering the probable nature of someone's past in order to be diagnosed in the first place?
I find it very upsetting that other people have been through horrors as well and I do my best to try and help out where I can.
If I'm having a day where I find myself liable to be triggered I don't browse the forums. (It took me a while to figure out when these days were!) It is very relieving however to know that there are other people who share my experience and we can
help each other out. It does demystify the experience a bit.
I'm glad you're being cautious beforehand, I was pretty cautious too when I first came here.
Trust is earned, not given. I hope you get the answers you need to make an informed decision about what
is best for you.