It's odd. The turtles themselves didn't bother me as much as I expected. Even though he looks ridiculous I felt Michelangelo's personality was just right based on what little I saw. That gives me hope the others will be similar. One thing that got me really annoyed with Transformers after the second one was how Bay decided Optimus Prime had to be all "give me your FACE!" like a god damn serial killer. I don't even want to get into the stuff he did in the third movie.
What bothered me the most was all the general "bay-isms" that filled the trailer, like the fast then slow shots, the oddly violent opening (following the Nickelodeon logo, for extra awkward factor), over emphasis on the hot girl, and EXPLOSIONS! It just felt like I was watching another trailer for Transformers, even down to the music having that "deeeooooooooooooo" sound effect whenever something happens like any minute Bumblebee is going to show up.