For me, it'll be a tie between using Don or Mikey, if they can be used separately and aren't just special moves for 1 of the other 2 Turtles.
If it's only Leo or Raph and the other 3 Turtles are just special moves or part of a combo for that 1 Turtle, then I don't imagine that I'll be using the 1 TMNT character much, aside from maybe when it first drops.
didn't vote for as far as I know we have not been told how they will play.. there will most likely, imo, be no choice and I am expecting the trait to be a random turtle swap and probably a random 1st turtle as you only pick the "guy in the trench coat" on the main menu.
Still traditionally Michelangelo is by far the most popular turtle in the comics and cartoons and toy lines and all that.
Competitively, I think it'll probably be Donatello, because he has a (seemingly) better character power that can mess with different opponents and I see that bo staff anti-air being VERY popular in the Tourney scene.
I could be 100% wrong on that, though, but just my hypothesis.
For this pleb, who loves playing as his favorite Turtle and is nowhere near Tourney level, Mikey and probably Don in close 2nd, because I'll probably be undecided for a while after yesterday's stream.
Donatello. He's the one people are mostly talking about. Although I feel people are going to be playing Donny and Mikey more, I think Leo and Raph may be the ones to pull off some crazier stuff when people actually start going more in depth with them. So In the beginning Donny and Mikey but later there will be more Leo and Raph