For what it's worth, look-and-feel is arguably more consistent on an OSS desktop than the average commercial workstation, these days. The vast majority of free apps and DEs are built on either GTK or QT, which have a broadly similar feel and can be themed to look identical. Meanwhile, closed/commerical apps are a mess of in-house toolkits and embedded web interfaces, and Windows even has several inconsistent styles in the base install.