Thanks for sharing tractorlegs. I'm only in my 30's, so probably not as much experience as you, but I have been riding since I was six most everywhere. After finishing grad school I rode less because of sheer distance between myself work, but in the last couple years have been back into commuting.
1. I've never worn cycling shorts- never felt the need to try them. Doubt I ever will.
2. I tried clipless for about a year and hated them. Never again. Love the convenience and versatility of my platforms.
3. I ride faster now

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4. I too like the utility of wider (ish) tires for all around use. Don't have anything against skinny tires either.
5. I admit I still don't like to be passed, but rather prefer to be the passer. But I'm getting over it.
6. Half the weight of my bike is add-ons: racks, panniers, lights, etc. X2
7. I don't give a flying donut what people think of my appearance on the bike, X2 (I have no illusions about living forever, but I want to stay in good health).
So for the most part I'm with you.
Matimeo