u don't actually have to quit any, as both are subscription free games.Quote from KushlolStarted playing Marvel heroes 2015 and have realized this game is everything diablo should have been and it's just incredible. People on the fence about d3 in it's current state or if you are one of the many people who have all characters fully geared and nothing to do....or maybe you just have an interest in good games. Give marvel heroes a try it is free and incredible and it is changing the arpg genre as we know it.
i play both on and off, when there are events in MH i'll play that, when there are patches in D3 i come back
TBH what keeps me playing MH are the developer teams.