Yup, I decided to talk about the (probably) most controversial 3D games.
When the Dreamcast appeared, I'm pretty sure a lot of people were expecting one of the main launch titles: a 3D game of Sega's most popular franchise,
Sonic Adventure. And even though the game was well-received between the general public and the fans, it also had the following flawls:
-A camera that seems to have its own conscience.
-Shitloads of bugs.
-Stupid characters with stupid gameplay (Big the Cat).
Curious fact, it's still generally considered the best 3D Sonic

And the Gamecube version (released like 4 years after the original DC ver) actually has a WORSE camera and more bugs, spite of having a lot of new features.
Then, some years later, before the Dreamcast officially died, Sonic Team made the sequel,
Sonic Adventure 2. Though the errors from SA1 couldn't be totally corrected, at least they were toned down, and Sega offered a good game to celebrate Sonic's 10th Anniversary.
Some months later, it'd be ported to Nintendo's Gamecube, becoming a success in that platform. A much better multiplayer mode, a way better Chaos breeding mode, and a lot of details from the original DC game were corrected.
In 2003, Sonic became a multiplatform franchise, with the release of
Sonic Heroes for PS2, GCN and XBox. The idea was good in theory, but it seems a lot of gamers didn't fully like the idea. Some of the biggest complains:
-The PS2 version has an unstable framerate.
-The tag-team gameplay wasn't newbie friendly, it was hard to get used to it.
-Chaotix Team's levels.
-The controls in the bonus levels were... ugh...
And... well, 2005, probably the lowest point in the story of 3D Sonic games, with the release of
Shadow the Hedgehog (also multiplatform), title that was criticized and bashed by almost everyone. Most common complains:
-Use of weapons and vehicles.
-No "target lock" function.
-Excessively hard sometimes.
-Crappy(ier) voice acting from 4Kids.
Funny irony: Shadow's camera is more friendly than in other Sonic games, and the bugs aren't that evident or annoying.
And now... the new
Sonic the Hedgehog for X360 and PS3. Can't write anything about it for now, since I haven't read a lot of things about it. Apparently, it was well received between the Sonic fans.
So, what do you think? I'll put my very personal opinion later
