I am a big fan of pantylines. YES! I wear underwear, real underwear and not a string up my ass. I don't care if you can see the line where they are...
If I can't see your panty line, then you probably have a string up your but, eeiw.
I wear real underwear too. And they don't have to look like granny panties to have a little 'sexy' about them. I'd rather wear black cotton with a little trim, than a string up the butt with a band-aid in front... any day!