Naaah. I made like 40 longtime steam friends because of playing on the same gmod server. Was lucky to find a server that had the most insane creators on it. You went onto any other server, they used what we made on that one. Drunk Combine, tanks, jets (including working VTOL), we had artillery that worked the same way it did in World of Tanks. 95% of the players there were insane at Expression 2 - which was a scripting / programming language that let you interact with the physics of the game in awesome ways.

I put the best 750hrs of my life into that server. It was called "Unsmart's" after the dude that hosted it. Closed down after a few years when the people moved onto other games. There was a shortlived revival, but it was more of a "reunion" than anything else. Still have everyone as friends and could probably get them together by pinging the group if I wanted to.