What do you like most about FreeBSD over Ubuntu?
If you're a small business and want to build proprietary system, and don't have the money to shell out millions in licensing fees; FreeBSD is your system. It's the only way to beat mega corps and incumbents. FreeBSD keeps this asymmetry in check. Before someone comments about open source, there are reasons out of your hand to keep source code proprietary. For those applications, FreeBSD is a boon.
Thing is, usually those reasons don't actually exclude the usage of GPL despite someone saying they do. Google is the biggest offender here, they have outright lied about the terms of GPLv2/3 in order to have quick and easy excuses to avoid it.
The BSD’s are purists. Strong consistency on the file system/configs, strong design principles on keeping things simple.
I only recently tried BSD’s after being a long term Linux user. I don’t use them on the Desktop, so can’t comment about that. On headless servers, after the initial getting familiar period, I find them a joy to work with taking me back to when I first tried Linux using Slackware.