Yep, OS X will only run on VMware Fusion – on the Mac. VMware Workstation won't run it by default, unless you install a hack, which might be the reason you got through the installation routine at all. For some reason VMware feels a strong calling to heed Apple's license, so they limit it intentionally.
Of course, OS X expects only to find specific Hardware, limited by the variations of Mac models.
You might have to fiddle around with the virtual monitor adapter or install proper kexts. I tried the same with OS X Lion back in the day and all I remember is that it was a pretty sluggish experience, so I didn't pursue it much further.
If your PC isn't totally out of the ordinary, you might just want to try installing it on a separate partition and run it kind of like Bootcamp backwards. I did that for quite a while and it ran nicely.