Until Jordan broke through and won a championship, he was just another great player, but had not gotten past the Celtics or the Pistons. He could have made a bundle playing at that level of success but what really distinguished him was that he was absolutely maniacal in his pursuit of winning.
I worked at the US Open tennis tournament while in college. By sheer chance I got assigned on my very first day as a security guard in the men's locker room entrance. They told me players and only were allowed in the locker room, so in a combination of being as authoritative as a Burns security guard can be and as friendly as a college kid can be, refused to let just about anyone in that wasn't a player. As a result, lots of people took notice, and they kept me there every day for that tournament, and when I came back the next year, assigned me to the same post.
What I learned meeting and chatting with some of the biggest names in tennis (it was the hey day of Connors and Borg, McEnroe was on the way up, Laver and Rosewall on the way out) was that there was very little difference in raw talent among the top 50 players. Of course there were differences, but what players told me was that the single most important attribute was that the guys on top had an unreal capacity to do everything it took mentally and physically to be the very best. Some guys had very short runs as #1 (Jim Courier, for example). Others longer but burned out (McEnroe and Borg) too soon. A rarity was Connor, who played at a high level till his late 30s.
Jordan had the unreal combination of perhaps being the best player by far, and wanting to win far more than anyone else, doing anything he had to do to win. Perhaps it makes him the best athlete of all time I don't know.
I had almost devalued Joe DiMaggio as being the best player on a completely loaded Yankee team that could have won with their eyes closed, until I read his biography entitled "A Hero's story" or something close to that. In it the author wrote how DiMaggio felt it was his personal responsibility to win a world series every single year. Anything short of that was a failure to him, and he came up big in big moments.
For the most part we didn't learn much about Jordan that we didn't already know, but I came away impressed at the incredibly hard work and intensity to play harder and work harder than everyone else.