Not that much deeply but I care about the RAM usage of the programs I usually use! Before upgrading my laptop, it had only 4 GB of RAM. This RAM limit caused me a lot of pain when doing my graduate project. About a year ago I decided to use command line apps as much as possible so that the RAM usage of my laptop decreases. Even though I upgraded my laptop's RAM to 8 GB, I still have the habit of checking the RAM usage of the apps I use! It's a weird obsession.