Oh, first season M:I, Bain was hot-hot-hot!
But every once in a while her yellow smoker's teeth ruined the effect. And when she'd blow smoke thru her nose - UGH!
I haven't noticed the teeth, but what does undermine her looks for me in first-season M:I is her skin, which is prematurely aged by the tobacco smoke. (I've often thought you could probably get more people to avoid or quit smoking by informing them that it causes wrinkles than you could by mentioning cancer, emphysema, heart disease, etc.) Great eyes, nice lips, not so great skin.
And as much as I loathe smoking, I can't help noticing in those M:I reruns that it did have quite a few social uses back then. For instance, all Cinnamon had to do to get a man to approach her was to take out a cigarette and give him an expectant look, whereupon he'd come over and light it. Not to mention all the bits where IMF characters use lighting a cigarette to conceal some sleight of hand, or use a matchbook to deliver a secret message, or whatever. As repulsive as cigarettes are, it's interesting from a sociological perspective to see how integral they were to the social customs and nonverbal language of an earlier generation.