To be embarrassingly honest, I rarely leave the house in anything fancier than yoga pants and a plain knit top these days. I am really not the person to be giving fashion advice.
However, even I cannot let this one pass.
Leggings as pants: If you're wearing them with a cute short skirt, or a long tunic-y top, they're actually kinda cute. The key is to COVER YOUR BUTT. Do not wear them with a top that doesn't hit at least the top of your thighs. No one needs to see every contour of your butt/crotch region.
Aside from the entirely unattractive "camel toe" issue, all leggings are not created equal, as far as opacity goes. Some of them tend to get a little see-through as you bend over, thus exposing your underpants to the world. Some of them eschew opacity altogether and just barely nod at decent coverage. Such as the ones the woman standing in front of me at school was wearing this morning.
If you won't stop wearing them for me, at least think of the children.