i've used both.. PCs only at home because i use autocad at home a decent amount, i worked for a little over a year in an office that used macs.. i didnt mind it but im just more comfortable on a pc.. after a year my boss bought all new macbooks w/ the intel chips and had me install parallels on them so we could run windows and autocad on them but still have macs for some of the older files (macdraft files)