Unfrumped makes a good point about not assuming a larger tub is a more comfortable tub. We installed a large "soaker" tub in our master bath in our previous home that didn't get used more than a dozen times in two decades. Once it was filled with water, it became impossible to relax in that huge tub because I kept slipping downwards until my feet touched the other end and my head was almosT submerged. Getting out was also a tricky, as was reaching in and cleaning that sucker.
When I wanted a bath, i used a much smaller tub in the guest bathroom which had high sides, but was still easy to get in and out when filled with water. It also had an ergonomic back that made it perfect for relaxing, soaking, and reading. The smaller room was also cozier and warmer than the large master bath. Plus, the smaller tub took half the water to fill it to the top than did the larger tub. To use my grannie's phrase, that soaker was "All show and no go"!