I think it isn't the assigning it to someone else vs. doing it yourself that sets Steve apart.
Many managers can't delegate tasks well and want to do everything themselves (that's more OCD). Other managers just slide everything off their desk and let it rain into the organization without ever looking back.
Steve Jobs, IMHO, has a thing for scrutinizing the work of others (and his own, most likely) seeing flaws and faults in them, telling them exactly how he wants it done and checking back how it has become. That might feel for a lot of people like obsessive, it can also be a way of taking care of your people. Not just telling them it stinks, but also telling them what exactly makes it stink and how you can not just fix that, but also improve on it. I also think he can be your worst nightmare boss, that never stops and can be quite unforgiving when dealing with fools or unwilling employees.
Most of us see Steve Job as more than just another CEO, has in some ways been an idealist. A lot of CEO just seem to be there for the money, earning bucket loads of money and when the going gets tough, they have no involvement, no compassion and they just leave. Jobs has *earned* a lot of money, but I think he was never in it for the money.
Another, often mentioned aspect is that he is a visionary. He can see the movement in a product, market perhaps even in parts of the society. With that insight he knows what direction he has to steer the company and what it needs to do. As most of us just plod along, he has a sense of direction.
And for that I envy him.