I'm a new t/s! ^^ but here is my advices.

BB 7:

/1 Center "wait.." and make it smaller so it coincides with the "don't...". Center "Muu-".

/3 Yeah bring "Baby...." down alot and might make it smaller. And also put in the -- before the !!. Center "Weak".

/4 Center "Let's explain", Fix the plant in the background and give all the text a dot at the end.
Make "aah.." a much smaller.

/5 Make the text in the bubbles smaller and center them. You missed the SFX

/6 Thoughts are in #545454

BB 11:

/3 Some punctuations to make it look more nice please, after the "oi oi"

/4 These bubles are not thoughts, change it to black.

/5 Center "trash" and bring down the other bubble a bit.

/6 None of them are centered.

/7 change size of "please..", biiggeeer


DD 1:

It's some good cloning. Make "master..." bigger and not slide. Story and art bigger.


DD 3:

/1 The hearts should be under the text. And center both bubbles.

/2 Take down the "I'm..."

/3 Center all the bubbles.

/4 Change the text to diamond shape and center them.

/5 Make "Devil..." A biiiit bigger but not so it too noticeable.


FT 3:

Just center all the bubbles....

FT 5:

/5-6 center both

/7 take down the "Begone.."


HB:

/2 Make all the text smaller. And remember that we don't like splitting words. The Book text is too gidd.

/3-5 they are not thoughts but character narration. So it's black. And dimond shape the "Isn't that girl cute"


Reborn:

"with their..." must be smaaalllleer. And the way you put the vongola family hurts my eyes >.< Remember that its westerner that reads this. They have problem reading up and down.
Better with the right to left. But goood cloning.