Any RV purchase involves trade-offs. The ease of driving and being able to park in my driveway without blocking another vehicle were important factors in my going with a Class B. Most of our travels are shorter trips, and some are solo since my wife is still working. We're more "touring" than "camping" at this stage, and might well have made another choice if we were going to stay some place for weeks at a time.
Small differences can matter. I chose the RT 190 with the larger "permanent" bath that also has the aisle shower option. That replaced the second row of Captain's Chairs, but we didn't have much use for them. Going to a RV show and seeing the various floor plans can help, although the online info is a good start. The choice between a B and a small C is a close call for some, and there is no right or wrong, it's all about how the trade-offs work for you.