If you're lost in a maze then a sense of direction is important. If you're tring to solve a maths quiz then matehmatical intelligence is important.
I persoanlly think no quality is more important as a human being than emotional intelligence. It's what allows us to take life's lessons and learn from them, it's what gives us empathy, it's what helps us analyse how we feel and use it. Without it I don't think we evolve.
Plenty of people go through life without any emotional intelligence and they are fabulously happy. But their kids aren't. Or their wives. Because it's a bit like being around a child in an adults body.
Emotional intelligence is not something you're born with, I think it's somethign you choose.
You can choose to just do whatever the fuck you like over and over again and to hell with everyone, or you can do the hard work of analysing and looking at yourself and the effect you have on other people, the quality of your relationships and how you are growing and learning.
I think everyone here on MN has emotional intelligence - because they are here, talking, asking, wanting to learn or to help. The desire to be better, to ask "AIBU???" is enough to be a start.
To me this i what emotional intelligence is. A desire to be the best human being you can be -even if it sometimes means hard work or changing its of yourself which are not functional.
Many people completely lack the ability to not only see themselves, but to change themselves. And many would prefer to blame everyone else for everything wrong in their lives.