When Aries and Aquarius get together, you get the impression that they could change the world – if only they stayed together long enough. Aries and Aquarius compatibility is a strange and wondrous thing when it works, but it’s not a terrific match for a conventional relationship because these two signs handle the world very differently. Aries and Aquarius compatibility stumbles when it comes to issues of space and fidelity, because while Aries demands loyalty, Aquarius demands freedom.