he looks fat from the front, but not from the side,
arms and legs are badly shaped out of cylinders, you have the accordian style going on there, and trust me it doesnt look that good, possibly try to shape the arms and legs to be more arm"ish", look at refs for that,
if you still plan on keeping the cylinders for legs at leas connect them properly at the pelvis area or you get a very messy end result, (as shown above)
his hands look great but they aint wide enough,
add a face to those pockets in he front, so it looks like a flap, that or round them off a little bit,
also the torso as well looks to ave been shaped out of a cylinder, if not i apologize, but it looks nothing like his vest from the side, the bottom areas you poofed out too much, amd made the armpit/side intersection too far to the sides, which is contributing to his fat look in the front view
(i did have more but i accidentally held backspace and went back a few pages, and ahd to try and remember all i had)