FROCK COATS ARE THE BEST. I own one (not a historical costuming one, but a modern-ish knit one that I picked up at a used clothing shop) and I have to be good and make myself not wear it EVERYWHERE. (Although specifically 1830s frock coats with the GIANT LAPELS and the weird sleeves and the open-front-down-to-the-bellybutton, I am still kind of dubious of.)