I agree with the others on the simpler is better approach to your partition scheme for a single user, home system. You are needlessly complicating your partition scheme IMHO. For my laptops, I usually just do three partitions, /,swap and a large separate data partition.
This is purely a matter of personal preference but my / is usually 15 to 20GB and my swap is 1.5 X ram. The data partition gets the rest and is used to store music, pictures, documents, movies, and other large data sources. This system is very good for those that like to distro hop as you avoid having to recopy over your large data sources. You just leave your data partition alone and install on the remainder of the hard drive. Most of those new to linux wind up trying out a lot of different distros at first and a simple partition scheme where you keep the data you will want no matter which distro you might happen to choose on a separate data partition saves a lot of time on data transfer. Once you settle down on your distro choice, it probably makes sense to have a separate /home if you plan to upgrade the distro over time as new versions come out. That way your desktop preferences can be preserved over the upgrade cycle.