Upside: Catalyst and Equilibrium, Action and Reaction, Aries forces Libra to act on own interests, Libra has lessons for Aries about relating and walking in the others shoes, both are visionaries.
Downside Ramming vs a more indirect, subtle approach, Aries impatience with Libra's weighing of pros and cons, Libra alarmed by Aries' reckless diving in.
Aries and Libra is one of those pairings that could start as many romcoms do today -- as a love-hate thing that's confounding and feels like dangerous romantic territory. It can go either way, and swing to either extreme.
Aries comes on strong, and makes a big show of their affection, causing Libra to think they've found the One. Libra loves being in love, and Aries is a passionate pursuer. The initial dating period can be exciting, with Libra really shining in the Aries high beams. Aries will appear 100% committed, and that's attractive to Libra.
It's also a steamy match, since Libra traditionally has a way of drawing out a lover, and Aries moves in quickly. There is an allure here, with signs on opposite ends of the Zodiac. It's a lover and a fighter, in one pairing. Libra can admire Aries' independent streak, and seek to take on these qualities. Aries really benefits from the sharp eye of Libra, which so often gives priceless, impartial feedback. Aries is a sign that has a hard time seeing themselves as others do. Libra is there to be that reflecting mirror, and Aries has the chance to gain self-understanding.
When trying to go beyond the infatuation period, Aries' provocative nature can be wearying to harmony-loving Libra. It's tiresome being the one always trying to keep the peace.
You might say these two have opposing agendas -- one wants harmony and the other revels in stirring things up. Libra feels like they're always being knocked off balance, and Aries finds Libra to be too much of a people pleaser, too co-dependent. Aries can seem rough and tactless to Libra, who is ALWAYS thinking of what others think. Libra can seem to have a weak will to Aries, with their need to balance their actions with the needs of others.
Here's a pair that has a lot to learn from each other, as signs in polarity across the wheel of the Zodiac. The potential is there for a lifetime of growth together, if they find that balance. Otherwise, it'll stand out as the brief, but unforgettable affair.
Read about the Dark Side of Aries.