[haunter]

Now make it _real_ mahjong (; https://en.wikipedia.org/wiki/Mahjong

Which makes me wonder which ruleset would be the easiest to implement. Probably MCR or HK, riichi has too many edge cases and sepcial rules and yakus.

[snvzz]

Riichi is the fun one, where skill weights over luck.

[alexb_]

Riichi is the most fun one, in my opinion, but I would not go so far as to say "skill weights over luck". The absolute best Riichi players win less than 25% of hands.

[haunter]

I also prefer riichi. Furiten is such a game changer, all other rulesets feel a bit less after that