Google's 200 Ranking Factors - The Complete List!

It seems a good many of us are gradually sitting by watching our money sites slowly slide into oblivion, while others are claiming to have cracked the new code.

I hear a lot about silo sites - and I've experienced some good results on a video site I own, that has almost no written content but is very well organised.

But my question is this.
I have another site that used to do very well on Google. A year ago it was hitting 450-500 visits a day and making very good conversions.

It has never been penalised officially by Google although until 2 years ago I may have purchased the odd dodgy backlinking campaign, but nothing too bad.

It contains well-written and informative content - I was doing longtail stuff since I started the site 6 years ago and the majority of pages have plenty of written text, images and videos.

It has a blog, which gets updated once at least once a month.

It contains plenty of old school SEO factors like alt text images, <H> 1,2 and 3s - but nothing over the top like Keyword stuffing.

It has all the usual social links and active associated pages on FB, LI, and Pinterest etc.

It's SCHEMA'd up to ****, and contains rich snippets for products, author etc

Over the last year I've focused more on answering questions in my blog posts, but again, it's ssomething I've always done.

Many of my LongTail videos still rank well.

But my main money site now ranks below some of the web 2.0 properties I've set up over the years, to drive traffic to it. And those '2nd tier' sites have certainly been subject to Black Hat techniques in the past.

It's basically dyeing a death, doesn't rank for money keywords, doesn't rank for LT either.
Just doesn't do much.

But with a PR2, 6 year history and a lot of time invested, I'm really loathed to walk away at this point.

WTF am I doing wrong?
Any ideas gratefully accepted

Hes not real?

I personally don't look at it like x amount of words makes you better. But what I look at is this.

Is my page the best page online for this subject/keyword?
Does my page have the most comprehensive and in-depth content about the subject/keyword?
Does my page match the search request adequately?

It could be a page with no text at all, maybe an image, a file a video. Or it could be a full chapter by chapter discussion about "War and Peace".

Shit like this gets muddled up so easily in SEO. All this text content stuff spawns from the world of blogger marketing. And does not pass over into other types of sites, which there are many.