1) A website that highlights individual games much like this thread
This is my choice for your poll, Megazell, and here's why: I prefer third-party consumers like yourself recommending individual games to me, because I know you are unbiased and have nothing to gain from doing so. The fact that you spend so much time helping all of us find and play awesome games means you have a passion for this that I greatly appreciate. And since you've played a lot of these yourself and wouldn't recommend malware to us, I feel safe installing them. If you can tell me a specific game I might enjoy, I'll be more apt to try it.
Someone else, on the other hand, could come across a "great" service for free games and tell you to go there, but there's no telling if they're marketing (read: lying) for referrals or some monetary benefit or not. And there's not always a guarantee that the website won't store or install malware or sell your personal information. And also, who's to say we'd all find the best game if there's lots of commercialization on the site (like there is with Steam, PSN, XBL, etc...)
I guess what it all comes down to is that I feel like user experience and recommendation for one game in particular is more important than a user recommending a website. In other words, if you were to say that Final Fantasy X Tekken was a great game over on RPGmaker.net, I would be more inclined to try it as opposed to if you told me RPGmaker.net has lots of good, free games, and I ended up downloading something awful that wiped my C drive on uninstall...