Thanks for reference...
Somewhere back in the deep distant past I learnt that a document should be produced by using the <h#> tags in their logical order, I think it was because that is what a "searchbot" expects to see (though I'm no expert!)
<h1> for your main heading, and probably only used once in a document, as you would generally only have one main title per page
<h2> for topic headings/categories
<h3> for your category subheadings
in fact I think it said there was probably very little use for the others (h4, 5 & 6)!
I don't know where I learned this (it was a while back ;))
So it's nice to see your post as it's a reminder that it's easy to resort to bad habits along the way (it's a bit like driving really)..it's OK if it works and you don't have to sit your test again, but in these days of HTML optimisation for SE's it's a point to note