More flourishy clothing is more common the less medieval the time period. So, big shiny suits of armor? 1300-1500.
Dark gray or black oil-burnt chain mail? 700-1300.
Plate armor is for sissies.
My characters vary. They mostly end up in priestly clothing, though. It's a bad habit of mine. If not priestly clothing, then heraldic tunics and breeches.
If anybody has any specific questions about medieval garb I can try and answer as I'm a history nut, sometime LARPer, and live with a professional Medievalist in the summers.
Edit: But honestly, most things are obvious. Nobody actually wears wizard robes, that's idiotic. Try riding a horse in it. Only sedentary folks would wear that. Try taking a poop in plate armor. Try wearing a bear skin in tropical temperatures. Try doing paperwork in gauntlets. See what happens when your three-foot beard is exposed to the candles and lamps and torches that proliferate in medieval society. Just you try and keep clean shaven, and thereby get septicemia. Good luck finding the money to develop an extensive wardrobe of brightly colored clothing. Oh and form fitting dresses? Probably not. Look at Medieval art: women's "hot" clothes are not form fitting, for the most part, until later. Rather, they involve lots of flowy embellishments, veils, capes, etc. Because making stretchy stuff is difficult. Corsets aren't invented until the 1300's at the earliest.