I am working on my ii V Is through the drop 2 and drop 3 inversions across the string sets. Trying to ingrain them in my DNA. I generally practice the Maj7 to Maj6 resolution in the Is.
Then I thought I would drop in some I vi ii V Is.
I had a lightbulb moment when it occurred to me that diatonic vi is the same as I Maj6!
Doh!
Are there some other obvious dots that can be joined that I should know about

?