Nice article on slashrandom:
I certainly think Eve is a casual game. This is mainly due to the skill system. No need to grind for hours on end to get better skills, you just get them overtime ! Only grind that there is, is the one for Isk. You’ll always need ships and gear to do anything and those cost Isk. If you pvp a lot, you even need more isk as you loose the ships far more often than someone who justs mines / runs missions and/or pvps every now and then. So you need some time to invest in running missions (more profitable than mining) to gain some wealth so you can enjoy the game more. But you can certainly do anything on your own pace.