I've said it before and I'll say it again for those who haven't read this whole thread... If I were to never buy premium and only wanted to play battles that had the best balance between all the nation tanks I'd play my Tier 2 T-26 tank. Tier 2 has about the best balance in the game and gives you some tanks with some power and performance and a big fun factor. Its not that the higher tier tanks have no fun factor but because of the match making system starts to really mess with you and you get thrown into some really off sided battles where you have no chance of doing anything remotely near anything good or fun. In Tier 2 the other tanks you face are not overpowering and you can take on any of them and live. Its more of player skill and occasionally some random luck. You don't have to worry about money or gold either if you do die.