Let me explain.
In my opinion, a good DM is one that you never feel the presence of within the game. If you, as a player, ever have the thought that the DM is doing something specifically for a metagaming reason, for instance the NPC with an adventure that is suited to the PC's level approaches you and you think, "Gee, how convenient," then I feel they've failed as a DM.
On the flip-side, to this, a good player should never force a DM into a position where he has to put his hand into the machine. Players should provide the game with forward momentum, they should be the driving force behind finding adventure and solving problems. A group that sits in a tavern and wonders why they're not adventuring, is not an adventuring group, IMO.
And yet, despite this, I find that most games I'm in tend to have both players that don't drive games forward, and DM's that force games forward for the sake of it. This is the biggest problem with tabletop RPG players these days. It seems that all the old-school style players who used to invest themselves in their character and the setting and move games forward by seeking adventure, have all either disappeared or turned into new-school gamers which seem to require being spoon-fed their adventures.
In all honesty, I blame video games. I play a lot of them myself. But there's this mentality out there that PNP RPG's should mimic this style when in fact, the whole attraction and point of difference of tabletop RPG's is that they're truly interactive and engage not only the imaginations of the players, but THEIR creativity. DM's should not be the only ones at the table creating the story; the players are just as much a part of the process as the DM. And it's this style of play that I'm hoping 5e encourages and leans towards because quite frankly, I miss it.