I played Test Drive Unlimited 2 again just last night. For the first time, I played TDU2 on a proper HD style monitor. So I got to see how pretty and how sharp the graphics are. I even got to see a few other players around Hawaii/Oahu. And sure enough, I encountered someone who thinks it's cool to borderline kill you by ramming into you and stuff. Most of my time was spent riding my Ducati Desmosedici RR around Hawaii. The majority of people I've eventually friended on PSN have been from Test Drive Unlimited 2. That's more than any other game or anything I've played combined- including Gran Turismo 5, Gran Turismo 6, Little Big Planet 2, and PlayStation Home.
I still stand by my thoughts that TDU2 could have been much more. It is still a fine game to play by exploring everything. A few different tweaks could have made the game great. But again, and at least to me, this game could have been a bit more.