Forum:Does playstyle affect drops/loot?

Obviously this is just personal observation, but I have noticed that enemies tend to drop ammo in a manner respective of the gun type you're using the most, e.g. if you mow down ten enemies with an MG, you'll usually find more combat rifle ammo afterward- usually. But I've also noticed that red chests have a propensity to produce guns respectve of the gun type you use the most. For instance I used shotguns almost exclusively with my soldier, and when farming New Haven (pre-patch 1.3.0) I would find almost double the amount of shotguns than any other gun type. I almost never found MGs with my hunter, as I never used them, but I find them much more frequently with my Siren as it is her second highest proficiecny rating. Is there any real evidence of this, or has anyone else seen similar results?