i (sic) really hate that "*nix" nonsense. If you mean Unix then say Unix.
There was a time when there were lots of Unix-like systems, but none could be called Unix because it was trademarked and would have resulted in a lawsuit. The whole SCO thing was just the last in a long line of such lawsuits. If you know *nix, you'll know that * is the "Kleene operator", or glob symbol as it's more often known, so it matches most of the alternative names or distros. Xenix comes to mind, but you might consider Posix too. Since it's humans doing the pattern matching rather than machines, stuff like HP-UX and Linux match too.
Anyway, *nix is a much preferable shorthand than "Unix(tm)-like systems".