Lots of noise you say? Where? I don't see anything 
First shot: ISO 1600, F5.6, 1/250. Second: same, but 1/320. Third: same, but 1/100. That's a *lot* of light for most PA settings. Even the last one. You could easily have been able to shoot at ISO 800 on this shots (okay, last one would have been a bit tougher), and when you buy yourself a nice F2.8 zoomy you've got like *no* reason to complain about the lighting at all. Dude, I don't even see the noise, but then again: I really think you couldn't have wished for better/more lighting.
For most of us ISO 1600, F2.8, 1/100 is "wow I've got enough light to work with and not get too much movement in my shots". I think most of us will more than once have thought things like "damn even F1.4 isn't enough right now" or "it sucks my camera doesn't go any further than ISO 3200 (or even 1600)"...
On the shots... 
First is nice, but seems to be a bit OOF, and I'm not really into the "looking straight into the camera"-shots.
Second is really nice. Well done. I think I would have cropped/framed it somewhat other though, I don't like his arms ATM. If I shot this one, I'd crop it to a square I guess.
Third: really nice timing, but I really hate the arm being chopped off the way it is here.
Well done for a first time though!