These two are almost opposite. Leo is emotional, expressive, youthful and warm, since it's ruled by the Sun. While Capricorn, ruled by Saturn, is cold, inexpressive, an old soul. And this is why they're often attracted to each other. Their relationship is hard to maintain, but very rewarding.
Capricorn can help the Leo looking more inwardly, being more down to earth and practical, while learning from the Leo how to be more open minded, expressive and social.
Cons
If they don't cooperate in order to keep the relationship healthy, it soon becomes a living hell. Their differences are very clear and "strong", and since they're so reluctant in adapting and changing their habits, it might tear them apart.
Capricorn is reserved and wants their partner to be that way too. But Leo is out-going, loud, extroverted, friendly and sometimes, even flirty - something unacceptable for the quiet, jealous, possessive and traditional Capricorn.
On the other hand, Leo won't stand the stingy and conservative personality of the Cap, who is just as stubborn and the fixed Leo. Arguments between them are endless and loud.
This is a wonderful relationship of two people who have the same approach on life and value the same things. They magnifies each other's qualities.
Both loyal and charitable, this couple is loving and devoted without being overbearing, which is a desirable mixture for each partner. Each appreciate the other's honesty and wisdom.
Capricorns seek security, so when a partner gives them this, they, in return, will also provide security. Both are independent and enjoy the independence of the partner, since they usually need space to pursue individual interests.
Cons
Capricorns care too much about work, schedules and responsibilities, so a relationship between two Capricorns won't be given much quality time.
Both very stubborn, fights between these two are not to be taken lightly. They also can be quite frivolous, blunt and unforgiving. If one of the Capricorns hurt the other too much, they will probably fall apart.
They're very cautious and serious, thus they need a partner that can balance this. In a pairing of two Capricorns there's no balance and boredom, dullness and monotony are likely to arrive.
They're opposite, so they complete each other. This relationship is very deep and brings great fulfillment. Each one has the traits the other lacks, and this connects them in a way few can.
Cancer admires Capricorn's devotion, reliability and ability to provide emotional security; while learning to be more ambitious and focused on goals.
On the other hand, Capricorn admires Cancer's persistence, traditionalism and ability to provide security of possessions; while learning to be more relaxed and enjoy life and its beauty.
Cons
Capricorn dislikes the moodiness and irritability of Cancer and their lack of practical consideration or ambition.
Cancer may feel to much for the unemotional Capricorn, who can really hurt the Crab's feelings. Capricorn is also too rigid.
They will take a great amount of time to properly understand each other, since they're have such different approaches to things.
