Holdem, I am unexperienced in Omaha and dislike that equties run super close to each other, so you need low rake or extremely high rakeback unless you are a compleeetee crusher, to win anything long-term...
Other then that, Omaha can potentially be more fun then holdem and you can play more
hands, and involves more complex decisions so it can be fun, I am looking to learn it way more when i will have the time.