This is sweet! The only improvements I suggest is making the cannon a little bigger and strait. And then the cockpit looks a little strange, maybe raise the slants around it and add some back ones so it molds into the ship?
It's a simple, well built design and the color scheme gives it the right amount of contrast to keep it interesting. The only things I would consider adding are a backstory for the tank and a neutral background to draw your eyes to the MOC itself. Otherwise I sense you have a long career of building ahead of you.
Very nice! This tank looks surely well armored, definitely enough to defend it from hailing fire from its enemies! I love the fact that the pilot and the tank share a common uniform color. Great build all-around!
That said, please don't run around asking for comments, and especially not in ALL CAPS, it isn't very professional. Build well, and the people will come. Joining groups can also help get your creations noticed.