One thing that really annoys me is the fact that he has a double jump. There just isn't any reason. It just makes platforming clunky.
I recently started a replay of Colours, and it was almost like the double jump was a foreign concept. I kind of forgot it was there until I realized there were a few platforms when I needed it.
I don't really think it's a bad thing, but I can see why people don't like it.
Oh man, Sonic Unleashed is such a refreshing change of pace after 06. It seems like a top-notch product (well, most things are compared to 06, but seriously, you can tell a whole hell of a lot was put into the game. See opening cutscene, soundtrack, and Night of the Werehog) and I am actively loving it.
I also can't believe I'm enjoying searching out medals so far (got all of them in Windmill Isle Night the first go) and the Werehog isn't terrible, though I only just got to Spagonia, and I can see exactly where I'll likely be frustrated later on.
Overall, great first impression. Hope it doesn't get too much worse later on.
The werehog outstays his welcome when his stages get extraordinarily long, or consist of a bunch of musou-like fights. I think the worst Werehog stage for me before Eggmanland was the Chun-nan Night one. Love the music, but man oh man, there's something about that stage...
Like, Sonic Unleashed feels like a much better effort than Sonic 2006. I think it's a good game. Both the SD and HD versions have different things to offer to the player, and sometimes stages from one is better than the other (ex: Cool Edge Day and Eggmanland in the Wii version are better than the HD version). The only thing is that searching for medals and lengthy Werehog stages can really screw with the pacing in that game. Otherwise, it's fine. Once you level up the Werehog, the stages feel more competent, but it's a shame you have to get to that point in the first place. Day stages, for the most part, are fine.
It looks absolutely fucking excellent, and the soundtrack is amazing. Even if you don't like the game, you can't really say that the presentation is bad. It's one of the best-looking games I've seen this gen due to art direction and colour palette alone.