What is it like...

You feel accomplished and a sense of closure but you have literally nothing to do at that point unless you're one of those people who obsessively try to reach 200 on every single character. The game experience pretty much ends at 140 for most classes. The few who drive on to 200 from there do so out a sense of inevitability or an expectation that something more is just around the bend and then one discovers that there is nothing new and the game no longer has any point.

The socializing aspect isn't really worth it because the people who are trying to level aren't suited to sitting in a town chatting all day in the first place, they want action and activity or at least the perception of it.