Man, seems like a lot of people don't really Half Life 2.
I don't know if I really have any super controversial opinions about games, but here's a couple that might be:
Mario 64 has aged horribly. It was great at the time, but going back now the levels seem very simplistic.
The series has lost a ton of appeal since 64 by losing the cool secrets. I remember the first time a friend showed me Bowser's Back Door and Star Road, it totally blew me away. Finding all the secrets in Marios was a huge part of the game, and that's mostly gone now. NSMB had some stuff like that, but the coins were pretty lame, you were collecting them just for the sake of collecting them, and the levels with multiple exits were super obvious. In fact, in the DS game you just beat the bosses as Mini Mario. I still liked Sunshine and love the Galaxies, but the series has lost a huge part of its initial charm.
I wouldn't compare it to the Galaxies, but Rayman Origins is a much, much better game than either NSMB. It's pretty different from 3D Land too, but after playing Rayman, 3D Land so unimaginative and amateurish. It feels like the Marios were someone just kind of randomly tossing obstacles around while Rayman levels are meticulously designed to show you what are basically "racing lines" that let you constantly run through the levels without losing momentum.
I love DLC. I think some of it is exploitative but with some work it could be a wonderful thing. I've been playing Gears 3 and there's a ton of weapon skin packs that costs a few bucks. I've seen a ton of people using the skins, so obviously people are buying them. I really, really like the idea of offering cosmetic things like that at a premium. If more developers/ publishers would follow Valve's lead and make the base game cheaper or free, or offer free add-ons, it'd be great.
That may be wishful thinking, but DLC is awesome right now as long as you're patient. I've been looking for a 360 RPG and I'm going to get either Dragon Age or Fallout 3, both of which are currently $20 new on Amazon and come with a few expansion packs each. Dragon Age comes bundled with an expansion that initially cost $30 as a standalone purchase. It's an awesome business model where everyone wins; people who have to have the newest game Day 1 can shell out $60 for the game and another $60 for the various add-ons, people who wait get a ton more content then they would have otherwise for a very low price.
Also, I almost didn't include this since it seems like a pretty common sentiment in this thread, but the God of War games are pretty garbage. Ninja Gaiden is still ridiculously superior to any other action game if you're willing to learn it, and Bayonetta offers a lot more freedom in comboing and a much wider variety of attacks and weapons if you want something more hack-and-slashy. So does Devil May Cry, but Bayonetta is the better game imo. On higher difficulty levels God of War is just rolling around fitting in a couple of light attacks whenever you can. I remember the first time I played 3 how jarring it was seeing the amazing graphics paired with the same old simple gameplay.