As a sys admin, I appreciate the effort to tune everything to your needs, and Arch has its place there for sure. As a user, I just want things to work. So I usually stay away from tweak-everything-you-can distros. So now on one hand you have the distros that do pretty much everything for you (ubuntu style), and on the other you have to do the tweaking for yourself(arch, gentoo, slackware, etc). I, for one, would prefer some middle ground - eg, a system being able to predict the most optimal setup for my box, but also allow me to tweak it should I prefer something different. RHEL/CentOS seems to be slowly getting this, and I enjoy its tools quite a lot (tuned daemon for kernel params optimization, kickstart for package customizations, etc.)