nah nah nah work in progress, I'm going to suggest your new here and just forgive you for that comment. Brushtool or line tool, they shouldn't really effect your smoothness or style, only the stickfigure construction. plus wobbles are easier to manage with line, but yeah, if you don't think you can be smooth with line tool, watch supranova. type that up on deviantart.

The reactions, for your first, are better than most I s'pose. but you should definitely keep the reactee in mind while animating the attacking guy, so that way when your doing reactions you don't come across as many problems and you don't have to make him fall super fast to come into the position he needs to be to get punched and such. also when he got kicked in the balls, the way he got hit back it looked like he should have fallen but he miraculously gained his balance again, You probably did that so he could be in the right place to get hit again? He probably should have been lifted a little bit off the ground but kept his legs kind of straight so when he lands it looks normal. Also don't worry about vcam for small animations like this, It takes up time and it's not too necessary