You are only a leader if people want to follow you. That is a somewhat loaded statement as incentives can encourage anyone to "want to follow you". Just look at the current President of the United States. Politics aside, whether you are organizing a community or leading a Fortune 1000 company, there are certain qualities that individuals exist that give people confidence in their leaders. According to the National Leadership Index for 2009, they are:
Trust in what the leaders say
Competence to do the job
Working for the greater good of society
Share my values
Get good results
In touch with people’s needs and concerns
Take these qualities and apply them to your leadership. I have run several people through my head mentally and find these traits to be accurate measures of what my gut reaction would be. For a couple, it's "yes, they are solid". For a few others "yes, they're good, but I'm not quite sure." Finally, for others I'm asking "who put this guy in charge" and they are failing in all of these traits.
I hope people nod their head when they think of me and say "yes, Mike is solid". I simply see these traits as black and white and, for the most part, things that cannot be learned.