As many of us are propably aware, Guild Wars 2 launched last saturday with it's 3 day headstart. Huge amount of people (just judging by most reliable source ever, XFire) stormed the server and traffic caused lots of things go haywire. Mail system, trading post, Hall of Monuments, login issues; there were lots of problems that is for sure!
I was there at the launch as well and ran into this stuff. For me there was 10 minute period I was unable to login and lack of trading post has been annoying. There have also been some laggy moments, though only in PvE. In PvP everything responded smoothly even in huge battles with close to hundred people around.
And none of those problems really mattered to me. I am having so much fun that I can absolutely forgive them for having problems as ArenaNet has shown in the past that they can work this kind of things out. In week or two when these problems are only a memory and everything works as it did during beta people will find other things to complain about. There will always be someone not satisfied with the product and that is fine. The game is absolutely not everyones cup of tea as it is rather radically different to your average MMORPG.
Will Guild Wars 2 have this many players 6 months from now? Propably not. Or might have. Why does it matter? Due the amazing server architechture ArenaNet have GW2 is less prone to large variations in population. They have overflow servers, guesting and server transfers for those times when there are less or more people playing and players can still find an enjoyable experience. Also their servers seem to hold huge number of players, someone calculated that just by the amount of servers and prepurchases servers need to hold around 20k people each.
The point if, game doesn't even need to become a second job. It can easily be enjoyable in small doses and there is stuff to do for manymany months. Obviously if you burn through content trying to achieve something (.. something?) there will propably be a point where you will need to start repeating things. But that is your choice, I intend to enjoy this game for forseeable future.