Thanks to a generous friend, I now own Garry's Mod on Steam. Installed and started playing it last night. Not too bad. Even runs fairly well on my laptop, which is surprising. As for how well I can use it, I believe this dog is an accurate portrayal...
Update: Been getting the hang of it. Mostly been downloading a fuckton of characters, models, guns, maps, you name it, and just screwing around with it. Posing ragdolls is easier than it was when I started. Still messing around with most of the tools and such. The game has crashed a few times more than I would like though, but it is to be expected when using a laptop that's not made for gaming.
One of these days I'll have a gaming PC...
KillerSkull
Gary's mod is...meh. It's fun to troll the RP servers though. And what is the name of that dog?
Klobb17
I'm starting to like it. Fun to mess around in.
And the dog's name is "I Have No Idea What I'm Doing Dog".