Advice for Borderlands 2?

[OneCatch]

Yes, I play as Zero.

I have asked them to leave me stuff but they don't really listen. I think they just get so into the frantic nature of it all they forget. I doubt they do it jsut to be mean. That's why I posted this, to see if anyone had ideas on how to get the loot before them.
I think having one of each thing is just bad game design for a co-op focused game like this.

Well if they forget, then remind them after the fight - if they picked up a rifle that they aren't going to use, they can drop it for you, no? I don't think it's bad game design to encourage co-op players to play cooperatively.
It's Borderlands, not COD TDM. This summarises it perfectly:

Seriously, tho. Friends don't ninjaloot friends' gear.

Anyway, it's really not an unreasonable request in a co-op game - in the days of BL1 I used to end up swapping, giving, and trading about half my loot with other people, because the group is more effective and the game is more fun if the right people have the right kit - especially for sniper classes.