And, overall, I dont think that a Debian box feels any less robust and stable than, say, a FreeBSD box. Of course, the recent spate of holes in Linux kernels are beginning to strain that.
Read the thoughts in this blog
OpenBSDs base userland is quite complete. I prefer the GNU userland because I am used to it, but OBSDs base system is quite workable. FBSD is quite a different story – In FBSD they strive to produce a minimal base system, and they dont expect people to only use that – they expect people to install many ports. FreeBSD becomes the most Debian-like system in the BSD family – you have a base system and you build on top of that. Its userland is whatever you choose it to be.