Ok, but why not run FreeBSD directly?
On servers, its awesome. Most every bit of hardware you will want is well supported and has great drivers.
On consumer kit like laptops, not so much. We lag behind with things that are primarily Linux driven by manufacturer choices. As an example, DRM support (that's Direct Rendering Manager, not any encryption malarky) lags behind Linux, so Intel graphics are really only supported up to Ivy Bridge.
This is because everything that Intel will push to the linux kernel has to be ported to FreeBSD, and there is a very small team of people (led by the awesome Juan-Sebastien Pedron) competent enough and with enough free time to actually do it. On Linux, there are teams of Intel employed software engineers doing this. Also, for a long time no-one in the Linux world could agree how the kernel interfaces should work for DRM; when there is that uncertainty, or it changes every year to a new system, it is disheartening to pour immense amounts of effort in to porting it.
Even when you have a consumer device manufacturer who does port stuff themselves, like nvidia who produce excellent closed source BSD drivers for their discrete cards, often there are rough edges, like missing CUDA or Optimus support.
I don't mean to be down on Intel, their server support is reasonable for chipsets and network drivers. (Its only "reasonable" because there is one guy for *BSD NIC drivers, and a team for Linux NIC drivers, and last I read Jack doesn't even get access to the cool test hardware, he has to borrow it from the Linux team..)