I'm just curious what people think, and what their preferences are.
I like to think of the PCs as being the rock stars of the setting.
At low levels they have potention, but there's a million other kids just like them, they have to perform a lot of local gigs, and the pay generally sucks. Notably,
they're largely responsible for finding their own work. Because they're not well known, the local lord
won't hire them to go deal with the goblin menace; he'll send his guards to deal with the problem (or just live with it). But if the PCs took care of it for him, he wouldn't complain...
At medium levels, they're considerably better known. They have agents who find them work, people come to them to hire them for various purposes, and so on. This is the group on the verge of breaking the big time; they're local heroes, they're on the rise... but there's a ways to go yet.
And then at the highest levels, they're rock gods. Here, they call the shots, they take on the gigs that interest them, and they are above the petty concerns of lesser mortals. But... they're also driven by their massive egos and, frankly, they tend to cause themselves as much trouble as they solve.
I'm not really sure you can have both archetypes in the same system as a starting point. They really are very different.
Have multiple starting points. In 4e, this could be done by adding in the missing "sub-levels" as an option for players who want to play through that.
In 3e, it's already theoretically possible. However, the big problem with this approach in 3e is that higher-level characters are not merely more powerful, they also become rapidly more complex as they rise in level. Ideally, it should be possible to create (and play) characters at 5th level quickly and easily, thus allowing groups who want to do so to omit the low levels without losing too much.
(Ultimately, for new players, I think 4e's approach is probably better - start them off as being already pretty heroic to provide the most satisfactory first adventure possible. But, yes, I do sorely miss some aspects of the low level play that is present in earlier editions and not so much in 4e.)