Besides the fact that I now have RSI (maybe not just due to Dota, possibly due to time spent in front of screen, overall), I realized after a while that I was a sort of people manager for 12-18 year olds and maybe I could just do the same thing at $DAYJOB and end up getting paid better :-)
(Not well, mind you...)
Does this apply only to certain (kinds of) games? Does it come from the way the game is structured?
Or does it have more to do with the community around it? For example RuneScape these days seems to be all about optimization, while back in the day it was more about exploration. (I guess for people who are still playing, there's nothing left to explore...)
However as another commenter said, any game can become work if you want to achieve perfection. For example if you play an FPS game you can always shoot faster and more accurately - if you practice more and more. This can lead to a point where you don't find the game fun anymore.
It was either make an imperfect solution and let it run for a hundred hours, or spend a hundred hours optimizing a perfect solution and then letting that run for ten more hours, or something like that.
At that point, I just tapped out. Building my factory just stopped being fun at that point.
there is no exploring left in runescape, for the most part - virtually every corner and easter egg is effectively documented or reverse engineered in some way.
Been playing MMOs since 2003 and in top raiding guilds/corps/etc since 2005, where this was highly rewarding.
Going without a computer (motherboard died) and having to quit MMOs for a while for economical reasons made me enjoy some single player games and heloed me fix this somewhat.
I'm getting Victoria 2 flashbacks just reading this sentence...
In moments when my character was near death I was often panicking and really feeling the tunnel vision of combat stress. The stakes were high in that a character and assets you spent over a year developing could be wiped out in an instant if you lost your focus. Eventually I couldn't take it and stopped playing.
On the other hand, there are games that are just straight up work - EVE is an example (haven't played it myself but do know people who do) and Rimworld if you play with an optimization/perfectionist mindset.