The simple idea to have a system in which i know how it is working and why, is one of the things why Linux has been my solution, the same happened in how i partitioned my disk, i can optimize the functionality of my system, simplifying it in different partitions where the data that must be allocated in the right place, now is easy for me to change my distribution, reinstall or upgrade it keeping safe my information of the last system i had installed without losing it, as if nothing has happened to the system, of course some configurations are going to be lost like the system configuration, but the user profiles and personal data are kept safe and i do not waste time for making backups and restore for my system, well that is for my home workstation used for home and develops reasons.
In change for servers it is a great idea to have partitions for the purpose the server will fulfill, I mean that if the server will be a web server it will need a partition to store the amount data of the web pages, it need to be organize in virtual partition that allow to store a lot of data, but for mail servers is not the same configuration, the partition need to be different, it need to allow to store all mails, for that reason need an specific place for the mail, the same for ftp servers and all services that need an specific space for each service, so those people who believe that making partition is not important is because have not exploit the linux resources, i know that there are people who like Linux and do not want to mess in difficult procedures and hard methods, also some of them has got the crazy idea that Linux can be handle as a windows system, well is not problem with that, but when they have problems, they blame Linux because it crashed or did something wrong, or because other amount of problems that from the start was their fault.
Well i am part of those ones who believe that: "The stability, security and safe of anything is inversely proportional to the easy management of it", we have the right example: Windows is easy but have lots of problems in all fields, Linux is not easy to handle, but!, it is the best thing of the world!.
In few words, if you do not see the important of the partitioning, is not bad idea to start having a simple system partition, the root (/) and swap partition in a home computer purpose, or a server that does nothing else than little services to a little amount of clients, but for the future i recommend to know more about it and how to do it, in that way you will know that the system works better with a good partition infrastructure. Sorry if i did sound strong.