I was thinking of this as well, I did not know there was a thread here!
Actually it was a bit different, but I can't recall it now.
(-) Things I've heard about a libran: indecisive, materialistic, bimbotic, promiscuous, lazy, loves luxury, extremely social to the point of social climbing, wussy, weak, pretty vase or arm candy, detached, unemotional etc.
(+) Things: fair, compromising, friendly, warm, mediator, intellectual, aesthete, harmonious etc.
I guess I would say all is true, somewhat.. but the beauty of it is that we're not made up of only one general sign, even if we are, the asteroid or houses also throw a focused energy off kilter.. so there's a mix of energies.
For instance, I guess I'm more indecisive than many because my merc is also in libra. But I have a saturn influence on my venus and sun so the saturn tends to thwart my 'happier' libran traits - as in, i'm more ascetic than materialist, even though I admit I adore pretty and luxurious things, but I don't actually get them most of the time. It also tones down socialability and promiscuity.
For some who say Libra has NO backbone, they miss out that Libra is a cardinal sign, and most of the time they are trying their darndest to smooth things over in the most non threatening of ways, so there is less conflict. I find myself either being the mediator, or just escaping the situation altogether and not get involved.
People have called me sleek, and evasive before, as if I was plotting something to thwart and sneak in a point and make it go unnoticed. Usually those who pick this up are aries and fellow librans though - I guess being the polar opposite and the similar party, they instinctly grasp it. But one thing is I don't debate to win - but get understanding of different points of view. Usually I let the other win because I sense an impulsive need to emerge victorious in a mental debate (especially for guys i guess).
Oh, another thing is about libran's preoccupation with looks. I think alot of librans rely on their perceived good looks too much, and place good emphasis on it. I don't know, but sometimes a self esteem problem may result, especially if they think outer beauty is to be honed more than inner strength.
Also, promiscuity I guess is for afflicted Venus - especially the squares.
Lazy? Yes, very.. but those I see make up for that by working and focusing. Knowing that you're lazy deep within is enough.
Unemotional, I guess as much as the other air signs, but as much as I appear unemotional, I guess the feeling cannot be escaped - it's just not expressed in the way society sees it, in the way of a water or fire sign.
I guess the others are true too in a way, but they can always be toned down - Libra is the sign of moderation, and my strong saturnian energy keeps it in check.
Oh, I am quite clueless when involved with someone of my own sign. It's like being literally blind. I can say I understand people of my sign well, but it's different in a relationship.
What i get are, they're mysterious (or trying to be), flirtatious, flighty, non-focused, and basically I'm describing myself through my 'partner', basically, my blindspot that I'm not aware of till I get faced with someone with such horrid qualities ;-) Oh, and they need constant reassurance etc etc.
And one more I get is Libra really absolutely need to be in a relationship else they'd die. For me, I've never been in one, and I need to be really sure that it would be forever or I'd steer clear (one of the illusions I like to hold on to). I guess it comes about because Libra, being the relationship sign, needs a mirror, REAL bad... so they become social butterflies in order to understand themselves through other people, and a relationship too, to help them love themselves.
*phew I've written enough, hope I didn't come across as self centred *