Erm... There are lots of different styles different people like, look at some famous modders models, for example, Heedicalking, Pandan, Bushido, Kaje, or Gravity cat. Look at them and see which you prefer. Personally I like Heeds and Pandans.
Make your barrels have about 8 sides, it makes it look more blocko.
What program are you using? I recommend Milkshape for the 30 day trial, then if you like it, buy it, and if you dont, move to Blender.
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