So..what other video games that captivates you a way like RO did/does

[Rhymaestro]

For me, for now by far it would be Final Fantasy Tactics. The sheer amount of combat and magic amongst its character jobs really make good use of roleplay and plotplay.

You can become a monk who summons a dragon.

Or a ninja who uses a gun.

Or a magic swordsman who can teleports.

It was just an amazing game! I remember pouring myself hours upon hour upon it, to the point that I manage to equip all of my squad with the legendary sword Ragnarok. 

I would wish I wanna make a game like that too.