Good comments and points made here. When we were first getting started over 20 years ago, we rented a 27' Tioga Class C, just to find out how we liked RVing.
We liked it a lot, but our experience with the Tioga showed us that we needed more room than the Tioga offered. A Class B might suit some people just fine, but others simply need more personal space. No one can know what will make you comfortable - it's a personal decision only you can make.
We ended up buying a used 37' Pace Arrow Class A gasser, and later traded it in for a new 40' diesel pusher. With just 2 of us and our small furball (dog), our current RV is 43' long, but I still consider it a "Class A Built for Two". It's a personal thing.
Which brings up my second point. Try to buy an RV you will enjoy for a while. It can be costly if you decide to trade up to get features you really wanted to begin with - RVs depreciate quickly.