If you wish to install a different distro in the future in addition to
Trisquel (e.g. Parabola) it is best to make a small home directory, as the
home directory also stores application settings which might not work if you
use a different version of installed packages (or the same version packaged
for a different distro) as the settings might be stored in a different path
or new package versions might not be compatible with setting files from older
package versions.
I would recomment something like this:
/swap - up to 2 GB
/root - up to 15 GB (unless you plan on installing lots of desktop
environmanets and large games in which case maybe 20 GB would be better).
/home - up to 10 GB (so you can also store email for offline use)
/storage (for movies, music etc) - the rest. This partition can be split in
the future (e.g. via GParted) if you want to install another distro as well.
Note that the number of primary partitions is limited to 4 (or 3 primary and
1 extended), so it might be preferable to make at least one of the partitions
extended.
