Two Cents (ok, maybe five) on the Ring Thing...
From what I've observed, ring traditions also vary with class vintage.
My spouse, a '62 guy, is just happy he can still get his ring on a finger, with arthritis. He was a left-hand guy, wore the custom curved gold wedding band designed to fit with the ring. It's on his right hand now, with the wedding band still hanging out on the left.
Of the mids we have sponsored over the last 10 years, the women seem to get it for the right hand (gotta save that left hand), and about even-steven for men, either left or right.
Back in the last century when I was a BattO, the Ring and Crest officer was one of my company officers. We used to get quite amused about how some midshipmen would do the "pimp my ring" thing and get every possible doo-dad and sparkly thing on it. I've seen plenty of diamonds as dividers and encirclers on both men and women's class rings.
Another tradition, with a touch of vintage to it, civilian fiancees would wear the miniature version of their grad's ring as an engagement ring, usually with diamonds around the matching center stone, eventually with a wedding band curved to fit. Those curved bands also can be set with diamonds or other gemstones. I've seen plenty of alumni wives wear serious diamonds in custom curved bands above AND below the miniatures. I've also seen alumni men wear the custom curved wedding band with diamonds channel-set.
One thing seems to be constant, the proper orientation of the class year either out or in, depending on whether midshipman or grad. As it should be.
For the moms out there, something fun to look forward to is a miniature of your mid's ring as a barrel pendant on a necklace -- tuck that one away as something to hint for. Nice gift from graduate to mom.