Well, @
pane-free already did a great job answering your question. However, I do have extra information to provide you.
When using logical drives, some operating systems will not boot off of them, so GPT is the best choice for multi-boot systems. Also, it is easier to manage the partitions when they are all primary. Having primary, logical, and extended partitions can get confusing. I prefer to follow the KISS Principle - "Keep It Simple, Stupid". There are other advantages to using GPT instead of MBR, but that alone can be a deep discussion.
Also, keep in mind that "/root/" and "/home/" are to different folders. Some newbies start to think that "/root/" and "/home/" are the same since they have a similar purpose. The Root user's home folder (/root/) is kept on the same partition as the OS. I have never seen someone place /root/ on its own partition, but it is possible. (Also, try not to confuse Root user with /root/ or with the root [as in "/"])
If you are saving file's in the Root user's home folder (/root/), then you may not need to worry about /home/. However, you should only be logged in as Root when it is necessary. Otherwise, you could accidentally cause system damage. I hope this helps.
If you have more questions, you may want to consider making a new thread if the questions start to shift from the original question/topic. Enjoy the website!