Been playing RRO since 2013 and Thor server since 2016. Whats good about RRO particularly thor is its casual gamer friendly. Donation is an option but not required, you can grind stuff through instances or get cash shop items for free via custom event like Bg, motd or vote point npc. If you become busy in real life, you can leave and comeback later on without worrying about losing your stuff. You dont have to worry about powercreep too or your items becoming outdated.