The persistent way
Create or Edit the file /etc/apt/apt.conf file and add the following contents to it:
// Recommends are as of now still abused in many packages
This will apply to ALL package installs.
The temporary way
Alternatively, if you would prefer to normally install recommended packeages, but ignore them in one case, you can simply add a flag to the command line. Eg:
sudo aptitude install
sudo aptitude install --without-recommends xxx
Note, you can have this set up the opposite way. To do this, make the changes above under "The persistent way". Then, when you want to install a package WITH all the recommended/suggested additional packages, simply add a --with-recommends flag to the command (the flag overrides the apt.conf file).