I experience it from time to time, with certain games. I don't feel remorse for playing games in general because quite frankly this is my sole form of entertainment. Okay, so I read, watch movies, and watch tv from time to time, but those times are rare. 95% of my entertainment comes from video games. Also 95% of the time I don't regret the time I spent playing a particular game because if I finish it, it means I enjoyed it. If I don't like a game, I don't play it, or stop playing. One game that I regret playing (or really one genre I should say) is World of Warcraft (MMOs). While I did enjoy the time I spent playing, I have spent $1000+ on the game over the course of 9 years. This includes subscriptions, the game itself, the expansions, paid server transfers, DLC such as mounts and in-game pets, etc. I regret all that time and money wasted that could've been either spent playing other games or more productively. Had I never even touched the game I wouldn't have ever kept going back to it. Playing an MMO in general takes massive dedication and in the end, I did enjoy the game but I'll probably never go back to it or play any MMO because I just can't afford to play for so long. Chances are, though, if it wasn't World of Warcraft I was so invested in, it would've been another MMO or some other game that is an incredible time sink.