Well, hi there! Even though I'm still new to PHP and phpBB I still love it!
1. It is under the GNU General Public License, Version 2
2. Simple and nice!
3. Freedom of choice
4. No ads
I started out with proboards but got fed up by the complexity and ads
22 days later and moved to phpBB
Tried vBulletin but it cost too much.
I got introduced to phpBB by WinBoards (Powered by phpBB) and stuck with it since then!
Thank you phpBB team for such a wonderful product.
phpBB is going to be a fortune 500 product in 5 years!