I can’t give you a definite set of skills required to satisfy my needs when recruiting on different positions. However, if you need some clues there I recommend my old posts about qualities of good developers and qualities of good project managers.
Anyway, I definitely can give you at least one skill which is a must-have in my teams. Ability and will to learn. OK, I gave two but they’re tightly connected. If you don’t learn you won’t qualify. Sorry.
I don’t expect to have perfect people in the team. They can suck in many areas and still be great employees, but at this one there won’t be any exception. From this perspective it can be called the most important soft-skill.
If you are learning you’ll become better, more knowledgeable and more valuable for a team. You’ll grow. If you aren’t learning, well, over time there will be many better than you. Why should others invest in you then?