find compatible hardware. Generally Intel processors are what work *the best* with OSX. Once you figure out what edition of Mac OS youd like to use, find the compatibility list on osx86project and try to aim for a compatible MoBo and Video card especially, along with the processor brand mentioned earlier. Updating can be problematic, so do not expect to be able to update with every patch released. Your system can be broken easily by trying to keep it as current as possible. Some things to read about are GUID vs MBR-type formatting; using AHCI over IDE-Compatibility mode (You could possibly RAID if you know what you are doing.) and Dual- or Triple-booting. As far as Appearance goes, that is up to you. Some people mod Apple cases, leaving them extremely stock or they make them unique.
