Which zodiac sign is associated with the happiest life?

Sagittarius, Cancer. They are ruled/exalted in Jupiter respectively. Jupiter deals with luck, fortune, higher education, and optimism.

Definitely Sagittarius. This is the most luckiest sign in the zodiac. Their ruling planet is Jupiter, the planet which expands fortune, luck, etc. Pretty much all the good things usually come directly to them in their lives. They always have very happy lives. That's why some people are jealous of them.

Seems to be luckiest...which is usually Scorpio

All in their own way- Sixth Sense

Happiest:

Virgo, Sagittarius, Aquarius, Taurus, Scorpio, Gemini, Crabs, Aries, Capricorn

Frustrated Life:

1º Leo: You are unsatisfied, stubborn, arrogant, you want feel superior

2º Libra: Sign of enemies and divorce

3º Pisces: Malefic sign 12th house is malefic death and end of life

Happiness is a state of mind, so it is not dependent on external factors but, rather, on what you have fed into your mind. Because 95% of our emotions arise automatically from the patterns in our subconscious that we have put in there.

As for astrology, it indicates how you will be IF you do nothing to change or grow. So people can end up different from the influence shown in their birthchart. And even the "worst" birthchart can be outgrown, and everyone has the capacity to learn how to be happy.

I don't believe in zodiac signs

Reality is what everyone should embrace.

Humans are not the center of the universe. It’s a conceded attitude. We’re specks on a spinning speck, that orbits another speck. Nobody designed us, nothing programmed us.