Are Mario RPG games any good?

[MakeAccountLater]

Yes. I especially like the Mario & Luigi games. They are set in their own worlds, filled with humor and specific characters. I especially enjoyed Bowser's inside story. But maybe you should start with Superstar Saga for GBA on WiiU virtual console. If you've got some leftover stars from Cluub Nintendo, I think it's only 1800 stars in the stars caralogue.