I used to have an AA account - that is where I started; and through AA I met Dave (Silverball) and Zivko, from whom I purchased my first pinball machines.
But when AP first started it had a better feel and obviously concentrated on pinball, whereas I wasn't really interested in arcade games. After a while I felt I could only afford the time to be on one forum so I let my account on AA lapse.
I do really enjoy AP, great bunch of friendly and knowledgeable blokes (and occasional blokess) who really love pinball, and who are willing to go out of their way to help each other.