which forum software did you become a admin on for the very first time? for me it was IPB which was hosted by IPBfree at the time.
I was working as a programmer and wanted to change to testing at the company I was at I did it by stealth, persuasion and persistence.My first software is phpBB hosted with My Free Forum.
My first board was phpBB 2, I quickly moved to myBB then on to vBulletin and really haven't looked back unless you count the 6 month move to XF.
The first forum software I ever used was phpbb, it was about 6-7 years ago after I created a temporary forum for a virtual pet site when I was a active member at @cpvr forum.
My first ever software was IPB. I used invision free and it was great until I found that there was more opportunities using vBulletin 3. It's now more opportunities using vB 4.
The very first piece of software I used to create a forum was phpbb. It also was compromised almost 2 months later. Overall, I really liked phpbb but I also was using it back in 2004/2005. Anyhow, here is a link if you are curious: https://www.phpbb.com/
I started on phpbb, then tried ipb briefly, then to vBulletin after vb 4, I tried ipb again and now I'm using xenforo with a vb license as well