Cyberflame>> I know it wasnt 100% fair to you and I appologize. But you have to understant too, that when you post something here, its like to put your skin on market. Dont be suprise if you don't get back what you expected to get.
I agree with zircher in every points he sat, so read his post once more and take good advice he is giving you ...if you already did not..
That tank of yours is something hard to give some critique (pos. or neg.) ...it hardly resemble tank and its untextured. My opinion is that its interesting but nothing special ...thats the reason why you probably did not get too much response so far...
Also you have to be bit patient, you can't expect wide attention by posting your firsth model, even if its relatively decent and for you its for sure exciting experience to find out that "you can model".
So my advice is to cool down and continue to advance your modeling skill. As you will become better, you get more response from others for sure.
Wish you good luck with that...