The best way to determine which type of RV to get is to list all your requirements. This includes things like:
how much storage do you need?
Do you want to be able to leave your RV at a site and go into town?
Do you want to tow a boat/motorcycle/atv/etc.?
Where do you want to stay (this requires researching actual places to see if there are size limits, etc.)?
Do you want to stay at RV parks or do you want to stay at more primitive campgrounds?
Do you want to store your RV at home?
Do you want all the comforts of home? Or do you want to change things up?
Determining your answer to these types of questions will help you make a better decision as to which RV to buy. By asking "class C vs class A?", the responses you get will be more about other peoples' answers to the above questions and their biases. And, as is said a lot on this forum "there is no BEST RV type, there is only the RIGHT RV FOR YOU".