appy appendix critique...honest and polite please

*first picture is the day I bought him in feb. Of 2011. And the next three are more recent pix

Hello everyone ! My boy is a 4 yr old appy appendix . I've had him a little over a year now, I ride or lunge him almost everyday. He was weened from his mother too early so he was an undernourished colt (much before I got him). I love him so much and would just like to hear some opinions on him.

How are his legs? Is he well proportioned ? Conformation ?

Also, many people I know have young horses, but then look as if they are a finished 9 yo horse as far as weight and muscle mass, however, my boy mack is still slim ( he is HEALTHY) but he isnt broad in the chest at all, and his neck is quite narrow. Actually it got thick and then over the last two months I feel it has narrowed out again :/ nothing has changed so I don't know what to do.
Any ideas how to make his front end match up to his hind ? Gain and keep muscle on him ?

ANY INPUT WOULD BE GREAT ! THANKS SO MUCH :)

Heres three more

I think he's quite the handsome fellow! Not exactly the best confo shots but he looks to be decently put together and in good weight/condition for his age. :)

Really nice horse :) slightly large head, does it lower its head when it canters? Beautiful. X

He is adorable!

Hes got nice colour.I feel he is tied in a bit high and his croup is a bit slopey,but all in all,not bad.Wish I could see more of his legs.You could work on his topline.It looks to me like he has bowed his right tendon at some point.A slow bow.

Oh my gosh !!!! He is darling, I want Bring him to my house.
How tall is he? Confo? Who cares, he is darling.

Okay I have to say for an appy I really like that boy. To me he's one you really have to look at to nit pick him over. Nice big boy you got. Love him!

I want him! Love everything. Do not look here when he shows up missing. :)

Don't come to Ga either if he goes missing! He is awesome.