I think that at this point it seems almost random which coin becomes successful.  But assuming the team is good, then I vote for the team.  Just marketing alone is a full time job, but it alone can also be the deciding factor for a coin: not value, use, or anything else.  Just how many people know about it, and if the marketing person can make it look sexy.

You can have the best coin in the world, but I think a team of people would be more successful creating and supporting a coin.