The rules that a lot of us have in place came about over a long period of time & are pretty much based on trends that we each saw that we didn't like. Like counters for example - there was a time when no one had a problem with them, but then some of them started with hidden files & spyware & whatnot, so a lot of us banned them.
I will say that I can't think of any rules that I've put in place for the last few years.
As far as what came 1st, I'd say (by definitions that we use today) galleries came 1st - just a page of pics (not thumbs, just the pics loading one after another) or a page of text links to the pics. Thumbs only became the norm a couple years later. When I started, I was just linking to pages that I found & thought looked cool. There was no distinction between TGP's & Link Lists, you pretty much just had a site that linked to porn
