Which has the most rewarding opportunity, Warrant Officer or Commissioned Officer?

You can’t just come in as a warrant officer unless applying for aviation, there are steps to becoming a warrant officer

Quality of life is the same for all Soldiers, your comments lend to warrant and start as enlisted. Either way you will have staff roles, but overall you will be much more hands on as a Warrant.

Don't dismiss the officer route too casually. There are many specialty and staff designations which are hands on pretty much all the time. As you promote, you help bring others along. I graduated with an engineering degree and voila, I wound up designing and building things down in Antarctica. Prior to the second deployment, I had to learn how to blow things up. As I promoted, there's a gradual reduction of "hands on" such that by O-4, I was leading and providing the required professional engineer supervision so others could qualify for their license. O-5 became all about my people making the mission happen and O-6 became added not letting the Flags harm my people.