<p>Glen,</p>

<p>Thank you very much for your largess!</p>

<p>I constantly go back to some posts that have helped me understand certain concepts. A good number of them are yours...</p>

<p>Right off the top of my head:</p>

<ol>
<li><p>@gung's post <a href="https://stats.stackexchange.com/a/92087/67822">on the linearity of polynomial regression</a> with absolutely self-explanatory plots is fabulous.</p></li>
<li><p>@amoeba got a prior 50-pt bounty for one of the all-time classics on <a href="https://stats.stackexchange.com/a/140579/67822">understanding PCA</a>, a post worthy of higher recognition.</p></li>
<li><p>Recently I found @ttnphns' post on the <a href="https://stats.stackexchange.com/a/119758/67822">geometric interpretation of PCA loadings</a> very useful.</p></li>
</ol>

<p>To be clear, I am abstaining from recommending any of the many unbelievable posts by @whuber because of his condition as moderator.</p>

<p>[Bounty started on #1. Awarded 30th May 2017]</p>
