In my campaigns, there are often months, if not years between levels after level 2 or so. I explain it as downtime training, random minor adventures that don't impact the overall story line and so on.
On the other hand even though I plan on going all the way to 20th in my current campaign, I generally prefer lower levels both as a DM and a player. I like, for lack of a better term, smaller worlds and smaller influence. The stories I spin, the connections I build at lower levels always feel far more personal. At a certain point you almost need something earth shaking to justify what you have to throw at PCs. This generally involves travel to other planes, invasions, some kind of catastrophe.
The more I get away from that friendly neighborhood adventurer theme, the less connected I feel to the world I built. Heck, some of my favorite campaigns (played and DMed) had the PCs starting out as kids with little or no offensive capability where the big bad monster was a single giant rat and most big fights involved snowballs.
But I also get enjoyment out of seeing growth and drool over all the cool things I'll get to do someday.
I'm thinking about suggesting a campaign that ends at level 10 for our next campaign but also much slower advancement and going back to the "start as kids" idea. That or start out at a much higher level so that the community I build around the group doesn't fall by the wayside. We'll see.
On the other hand even though I plan on going all the way to 20th in my current campaign, I generally prefer lower levels both as a DM and a player. I like, for lack of a better term, smaller worlds and smaller influence. The stories I spin, the connections I build at lower levels always feel far more personal. At a certain point you almost need something earth shaking to justify what you have to throw at PCs. This generally involves travel to other planes, invasions, some kind of catastrophe.
The more I get away from that friendly neighborhood adventurer theme, the less connected I feel to the world I built. Heck, some of my favorite campaigns (played and DMed) had the PCs starting out as kids with little or no offensive capability where the big bad monster was a single giant rat and most big fights involved snowballs.
But I also get enjoyment out of seeing growth and drool over all the cool things I'll get to do someday.

I'm thinking about suggesting a campaign that ends at level 10 for our next campaign but also much slower advancement and going back to the "start as kids" idea. That or start out at a much higher level so that the community I build around the group doesn't fall by the wayside. We'll see.