Much depends on your use cases I figure. Here's an example about my mixed feelings for Linux : I use Debian among others on the desktop. I noticed that when I log out from the GUI and return to the Display Manager a lot of processes keep running in the background all owned by my user. Maybe not a problem but I do not like it so much. I compared it with an OpenBSD installation I have. The same happens except for less processes and none of them is owned by my user.