jj is an expert on an extensive list of subjects. Let's get down to it.
Identities. The rug was never to look better. He had multiple identities and had a nearly complete UK profile setup. It's very hard to trick UK books into thinking you're in the UK and a real person, but he had a UK drivers license, social security number, legitimate mailing address where some old broad would forward his mail to someone else who would then forward it to jj. He had tentacles all over the world.
IT/security. He had a setup of proxy servers re-routing traffic from Asia, Europe, Australia, all through his basement. He has set up wireless bedrooms all over the NJ area.
Banking. He had HSBC accounts around the world but was sharp enough to close them all before FINCEN crackdowns. ALWAYS one step ahead of the rest!
Fitness. The guy is rock solid from the waist up and pioneered spider pushups on this forum. Very puny chicken legs though. He was a renowned expert at bodybuilding.com but apparently the meatheads there did not appreciate his attitude.
Romance. He was also a power poster on the TLC Loveline Companion. He had all sorts of wild stories and the posters either loved him or hated him there. Unfortunately all his posts there are gone. Of course he was ultimately banned there too.
Sports betting. It was jjgold who coined the phrase, "there is no juice when you win".
Phone etiquette. SlickFazzer has retained a small piece of history here:
Jersey-related terms and behaviors. The art of duking, loan sharks, underground gamblers meetings, bath houses, gay construction worker scenes, and of course DELIS. It was jjgold who invented the three team reverse birdcage.
I must be forgetting 100 other things??