I personally think that wire-mod has ruined Gmod. Before it used to be about the building. Now, 3/4 of the contraptions forum is boring wire-mod shit that half of us don't understand and even if you did, is boring as hell.
Don't get me wrong, I think the people that use wire-mod are smart to understand it, and it is useful for gcombat and the like. I just think people have taken it too far, "Wow, another engine, never seen that before!" I just wish we could go back to the old days where building skill still counted.