Well, GTA V is not recommended. I just went online for the first time, and I was instantly treated to a fight between some very rude, racist people. The things they said man....0.o
I would say there are a lot of good people on Steam. TF2 and LFD2 had pretty cool people playing most of the time. Occasionally you would get a troll in L4D, but I met some very cool people, and I don't regret sifting through the few bad ones.
Also, I was treated decently in SWTOR. Now, I KNOW this game is not for everyone, but I'm a huge fan of Star Wars lore, mostly before the Empire though. This game was right up my alley, it really is a sequel to KOTOR II. Not a true, sequel, but the mechanics are basically the same, you seem social enough to join flashpoints, guilds, whatever else I missed out on due to being antisocial. There are some decent story lines too, not great, but entertaining. Basically on the friendliness scale, I used to ask how to do things in chat (a lot of other people did too, whether they were lost, or they were new and needed to know how to perform a task) and while this happened quite often, only once did I receive a negative response. Which wasn't that bad, I asked for help on a low-level boss because I was tired and didn't feel like grinding the extra level, basically someone just said, "Oh please, he's not that hard n00b". Usually people are very helpful. I enjoyed me time there, I would still be playing if my computer would run it (why put a GPU in a CPU chip? that's asking for a fire hazard).
But those are my suggestions, and whilst on the topic of Star Wars, why has no force user ever just crushed their opponents focusing lens, crystal, or energy cell in a lightsaber battle?