What are some things you wish you knew when you made your first GMOD server?

For me it was that DarkRP game modes are kinds lame lol

That I need to design it to be able to trick inexperienced roleplay players into roleplaying. You need to pack in as much content as possible and people want actual systems because constant no script serious rp is dead. You need to make sure to make the server idiot proof.

I'd wish I knew about backdoors, had fun with scriptkidding back in the day