They suck for a variety of reasons. Some of the obvious are easy. The first is Sonic Team lost all it's good developers, now it's just full of shoddy programmers and designers who didn't work on the old good Sonic games. Every single person who made Sonic 1 on Genesis has moved on. Another is shitty management at SEGA just milking the franchise and not caring about it. That's why we get stuff like Sonic on 360/PS3.

Another thing you have to realise is that Sonic is completely different than it was prior. As long as we keep having to fight war Gods, have a bunch of 1998+ characters(Shadow, Rouge, Omega, Big, Cream, ect.), having Sonic and Tails not the main characters, and no Robotnik as the villian(he's always a minor one); it's just not going to feel the same. All of this doesn't even relate to the gameplay, it's just without the same feel you're not going to have any of the same charm or whatever that makes Sonic likeable to anyone. The gameplay and stuff sucking is purely due to lame staff which can be replaced.

Just because a game is put on a certain system does not mean the developer does not care about it.

... Sonic N for the N-Gage?

Also I just realised what you mean. I'm saying that game because it's horrible in almost every way. Not because it's on those systems. Don't pick apart statements and change them around, if that's what you're doing(also don't get mad if that's not what you're doing).

Honestly thought you were saying that because the sonic games were on ps3/360 they were crap (though the 'next gen' graphics could be blamed) and not just alluding to the crap that ended up on those systems. It seemed that way since that was the only one you mentioned by name and not the number of craptastic ones that were on other systems.

So from what people here are saying it's because of bad camera, too many characters, not as fast, exploring, and 3D. Not really that big reasons for all this hate.

I have something against sega not sonic.

Well i agree that too many chars , no speed and 3D are not big reasons but the game camera is a huge reason. I've gotten nausea because of Rayman 3's mediocre camera (great game other than that. Also exploring is a big reason because the 2D Sonic games were getting through a level as fast as possible, and thus exploring adds more time and takes away the sonic feel. 

@Leo, 

Uh...good for you?

Agreed. I personaly hope the main series goes back to 2D.

I like sonic but the games havent graced so well since the demise of sega consoles but the DS brought back good sonic memories.