Disclaimer: I actually love Shadow The Hedgehog, it's one of my favorite Sonic games.
I am TOTALLY late to this discussion, but... yeah, it's one of my favorite Sonic games too.
Alot of people call it one of the worst but.... eh. I enjoy it. It's one of my favorite games. And one thing I'd like to point out is that while it's not perfect, I STILL never had anywhere near as much trouble with it as I have had with Sonic Adventure 2. Now, keep in mind, Sonic Adventure 2 is ALSO one of my favorite games, and just like Shadow the Hedgehog, I usually replay it once a year, but I typically have more trouble with Sonic Adventure 2 than Shadow. The Lethal Highway in Shadow with the motorcycle is a bit clunky, but not enough to make me ragequit. To me, that's the clunkiest part of the game. I was fine with the rest of it..
Meanwhile in Sonic Adventure 2... when I do my annual replay of that game, I always DREAD Mad Space and Cannon's Core. ESPECIALLY Mad Space. In Mad Space, if you're not fighting the camera, you're getting stuck, and if you're not getting stuck, you're trying to play a level that's trying to be Mario Galaxy before Mario Galaxy was even possible, and if you're not doing that, you're reading upside down clues and travelling all over this wreck of a level trying to find them. Sometimes I'm at that level for over an hour. And after I finally get done with that level and the boss fight with Knuckles afterwards, I have to quit for a bit, since I get a bit mentally fried with that level.
Then the Cannon's Core is really irritating, where you have to play as all the characters for a short segment each. IF YOU DID NOT GET THE AIR NECKLACE AS KNUCKLES, YOU'RE GONNA HAVE A BAD TIME! Then of course Sonic's segment has that fork in the road right at the beginning that requires you to go right and fight the Artificial Chaos, THEN fight against the camera angle to go left. Did I mention that all the segments with the characters count as one level, so if you get a game over as Sonic at the final leg of the level, you have to start over and replay all the characters again. Once you get to the boss battle of Shadow vs the Biolizard, it's good again, but Cannon's Core has some really clunky design... clunky enough to make me ragequit.
Shadow the Hedgehog to me had some minor annoyances (mainly Lethal Highway Hero Mission and Circus Park Hero Mission), but never enough to make me want to take a break. I like it!
back! 
or Issac I can't choose for veterans hopefully Lucas with a less clone like move set although for reasons I preferred him instead of Ness
