Warhammer Age of Sigmar: Champions has a lot of great ideas. Combine this with the rich and deep Warhammer universe and you have the makings of a great card game that’s different and unique enough to stand out against the two big behemoths that are Magic the Gathering and Pokémon.
If you've completed the story there's still a lot to do in this world, of Warcaft. New dungeons with fun themes and locations are enjoyable to grind through and PVP is always a fun whether you're casual or hardcore. The world, of Warcraft is bursting at the seams with stuff to do. Don't Like PvE? Try Pet Battles. Don't Like Pet Battles? Try PvP. I'm a pretty casual player and the thing I enjoy doing the most is going back to old content and playing through it solo, for the first time.