Is the only reason not to use port 80 the one outlined here?
- If your computer isn't running a webserver, and you haven't set AccountingMax, please consider changing your ORPort to 443 and/or your DirPort to 80. Many Tor users are stuck behind firewalls that only let them browse the web, and this change will let them reach your Tor relay. If you are already using ports 80 and 443, other useful ports are 22, 110, and 143.