If you like to play around with different distros I suggest you look at my posts in the below linked thread. I have tried lots of different setups to make it as easy as possible to try different distros as the mood strikes me. The separate /home solution has some advantages, but also some disadvantages. To start with, a separate /boot, /, and /home partition for each distro soon turns into a nightmare of a partition table with only a few distros.
You also have to do a good bit of work to save and/or restore your old desktop configurations if you decide you don't like the new distro desktop as much as the old.
It gets worse from there. /Home can be, and usually is, completely incompatible between distros, severely limiting the distros you can try and share /home with. I am not saying having a separate /home is a bad idea. Just that it isn't as trouble free for distro hopping and experimentation as you might think.
What I am now doing is putting all my data into one or more separate partitions and mounting them in the /home directory. If you use the same user name and password on all your distro installs, you won't have any permission problems sharing these data partitions between distros. If you need to use different user names thats ok. You just have to set the permissions on your data files so any user has read/write privileges. Or create empty user shells with all the user names and put them into a group that has read/write privileges for each distro.
Doing it like that protects your data in case the install is a total disaster, or you break everything to the point you can't get into you /home at all. It also allows you to see what the distro desktop looks like "out of the box" without a lot of adjustments. You will also have quick, easy access to your data from the new distro.viewtopic.php?f=46&t=10043&st=0&sk=t&sd=a&start=30
Hope this is helpful.