Personally I prefer casual and comfortable.
Like what I'm wearing now--brown sweats with mint green stripes, a bright-green sweater, and mint-green slippers.
If I were going out today (which I don't plan to) I'd be wearing boots instead of the slippers and my heaviest winter jacket. Our weather's below zero today.
But I prefer to dress my dollz and avatars in the sort of things I'd die for even though I wouldn't wear them in real life because I don't have the physique to wear them, can't afford them, or don't have the lifestyle for them.
Like rainbow-colored hair and funky minis and tops, stockings and leg warmers, spike heels and platforms, and those big heavy boots. Also gorgeous formal gowns.