I like Alaska's program because it's mileage based rather than dollars spent. But I am kind of a rookie traveler compared to many on here so take me with a grain of salt. I'm an oddball in that Covid meant me traveling 20X more than the 1-2 flights per year that I previously did. Most flights are west coast to Hawaii and once I made MVP status I started getting some good perks. Now that I'm MVP Gold I get somewhat frequent upgrades to first class. Always at least to premium. So, I'm pretty happy with Alaska but don't have much to compare to.